diff --git a/lib/vagrant/driver.rb b/lib/vagrant/driver.rb
index 8976bdbbc..9f114f80e 100644
--- a/lib/vagrant/driver.rb
+++ b/lib/vagrant/driver.rb
@@ -1,6 +1,7 @@
 module Vagrant
   module Driver
     autoload :VirtualBox, 'vagrant/driver/virtualbox'
+    autoload :VirtualBox_4_0, 'vagrant/driver/virtualbox_4_0'
     autoload :VirtualBox_4_1, 'vagrant/driver/virtualbox_4_1'
   end
 end
diff --git a/lib/vagrant/driver/virtualbox.rb b/lib/vagrant/driver/virtualbox.rb
index 238238ee3..b28e189e1 100644
--- a/lib/vagrant/driver/virtualbox.rb
+++ b/lib/vagrant/driver/virtualbox.rb
@@ -41,7 +41,25 @@ module Vagrant
         end
 
         # Instantiate the proper version driver for VirtualBox
-        driver_klass = VirtualBox_4_1
+        @logger.debug("Finding driver for VirtualBox version: #{@version}")
+        driver_map   = {
+          "4.0" => VirtualBox_4_0,
+          "4.1" => VirtualBox_4_1
+        }
+
+        driver_klass = nil
+        driver_map.each do |key, klass|
+          if @version.start_with?(key)
+            driver_klass = klass
+            break
+          end
+        end
+
+        if !driver_klass
+          supported_versions = driver_map.keys.sort.join(", ")
+          raise Errors::VirtualBoxInvalidVersion, :supported_versions => supported_versions
+        end
+
         @logger.info("Using VirtualBox driver: #{driver_klass}")
         @driver = driver_klass.new(@uuid)
 
diff --git a/lib/vagrant/driver/virtualbox_4_0.rb b/lib/vagrant/driver/virtualbox_4_0.rb
index abb09e88b..cce816aea 100644
--- a/lib/vagrant/driver/virtualbox_4_0.rb
+++ b/lib/vagrant/driver/virtualbox_4_0.rb
@@ -1,8 +1,352 @@
+require 'log4r'
+
+require 'vagrant/driver/virtualbox_base'
+
 module Vagrant
   module Driver
-    # Driver to communicate with VirtualBox 4.0.x
-    class VirtualBox_4_0
+    # Driver for VirtualBox 4.0.x
+    class VirtualBox_4_0 < VirtualBoxBase
+      def initialize(uuid)
+        super()
 
+        @logger = Log4r::Logger.new("vagrant::driver::virtualbox_4_0")
+        @uuid = uuid
+      end
+
+      def clear_forwarded_ports
+        args = []
+        read_forwarded_ports(@uuid).each do |nic, name, _, _|
+          args.concat(["--natpf#{nic}", "delete", name])
+        end
+
+        execute("modifyvm", @uuid, *args) if !args.empty?
+      end
+
+      def clear_shared_folders
+        execute("showvminfo", @uuid, "--machinereadable").split("\n").each do |line|
+          if line =~ /^SharedFolderNameMachineMapping\d+="(.+?)"$/
+            execute("sharedfolder", "remove", @uuid, "--name", $1.to_s)
+          end
+        end
+      end
+
+      def create_host_only_network(options)
+        # Create the interface
+        execute("hostonlyif", "create") =~ /^Interface '(.+?)' was successfully created$/
+        name = $1.to_s
+
+        # Configure it
+        execute("hostonlyif", "ipconfig", name,
+                "--ip", options[:ip],
+                "--netmask", options[:netmask])
+
+        # Return the details
+        return {
+          :name => name,
+          :ip   => options[:ip],
+          :netmask => options[:netmask]
+        }
+      end
+
+      def delete
+        execute("unregistervm", @uuid, "--delete")
+      end
+
+      def delete_unused_host_only_networks
+        networks = []
+        execute("list", "hostonlyifs").split("\n").each do |line|
+          networks << $1.to_s if line =~ /^Name:\s+(.+?)$/
+        end
+
+        execute("list", "vms").split("\n").each do |line|
+          if line =~ /^".+?"\s+\{(.+?)\}$/
+            execute("showvminfo", $1.to_s, "--machinereadable").split("\n").each do |info|
+              if info =~ /^hostonlyadapter\d+="(.+?)"$/
+                networks.delete($1.to_s)
+              end
+            end
+          end
+        end
+
+        networks.each do |name|
+          execute("hostonlyif", "remove", name)
+        end
+      end
+
+      def discard_saved_state
+        execute("discardstate", @uuid)
+      end
+
+      def enable_adapters(adapters)
+        args = []
+        adapters.each do |adapter|
+          args.concat(["--nic#{adapter[:adapter]}", adapter[:type].to_s])
+
+          if adapter[:bridge]
+            args.concat(["--bridgeadapter#{adapter[:adapter]}",
+                         adapter[:bridge]])
+          end
+
+          if adapter[:hostonly]
+            args.concat(["--hostonlyadapter#{adapter[:adapter]}",
+                         adapter[:hostonly]])
+          end
+
+          if adapter[:mac_address]
+            args.concat(["--macaddress#{adapter[:adapter]}",
+                         adapter[:mac_address]])
+          end
+        end
+
+        execute("modifyvm", @uuid, *args)
+      end
+
+      def execute_command(command)
+        raw(*command)
+      end
+
+      def export(path)
+        # TODO: Progress
+        execute("export", @uuid, "--output", path.to_s)
+      end
+
+      def forward_ports(ports)
+        args = []
+        ports.each do |options|
+          pf_builder = [options[:name],
+                        options[:protocol] || "tcp",
+                        "",
+                        options[:hostport],
+                        "",
+                        options[:guestport]]
+
+          args.concat(["--natpf#{options[:adapter] || 1}",
+                       pf_builder.join(",")])
+        end
+
+        execute("modifyvm", @uuid, *args)
+      end
+
+      def halt
+        execute("controlvm", @uuid, "poweroff")
+      end
+
+      def import(ovf, name)
+        total = ""
+        last  = 0
+        execute("import", ovf, "--vsys", "0", "--vmname", name) do |type, data|
+          if type == :stderr
+            # Append the data so we can see the full view
+            total << data
+
+            # Break up the lines. We can't get the progress until we see an "OK"
+            lines = total.split("\n")
+            if lines.include?("OK.")
+              # The progress of the import will be in the last line. Do a greedy
+              # regular expression to find what we're looking for.
+              if lines.last =~ /.+(\d{2})%/
+                current = $1.to_i
+                if current > last
+                  last = current
+                  yield current if block_given?
+                end
+              end
+            end
+          end
+        end
+
+        output = execute("list", "vms")
+        if output =~ /^"#{name}" \{(.+?)\}$/
+          return $1.to_s
+        end
+
+        nil
+      end
+
+      def read_forwarded_ports(uuid=nil, active_only=false)
+        uuid ||= @uuid
+
+        @logger.debug("read_forward_ports: uuid=#{uuid} active_only=#{active_only}")
+
+        results = []
+        current_nic = nil
+        execute("showvminfo", uuid, "--machinereadable").split("\n").each do |line|
+          # This is how we find the nic that a FP is attached to,
+          # since this comes first.
+          current_nic = $1.to_i if line =~ /^nic(\d+)=".+?"$/
+
+          # If we care about active VMs only, then we check the state
+          # to verify the VM is running.
+          if active_only && line =~ /^VMState="(.+?)"$/ && $1.to_s != "running"
+            return []
+          end
+
+          # Parse out the forwarded port information
+          if line =~ /^Forwarding.+?="(.+?),.+?,.*?,(.+?),.*?,(.+?)"$/
+            result = [current_nic, $1.to_s, $2.to_i, $3.to_i]
+            @logger.debug("  - #{result.inspect}")
+            results << result
+          end
+        end
+
+        results
+      end
+
+      def read_bridged_interfaces
+        execute("list", "bridgedifs").split("\n\n").collect do |block|
+          info = {}
+
+          block.split("\n").each do |line|
+            if line =~ /^Name:\s+(.+?)$/
+              info[:name] = $1.to_s
+            elsif line =~ /^IPAddress:\s+(.+?)$/
+              info[:ip] = $1.to_s
+            elsif line =~ /^NetworkMask:\s+(.+?)$/
+              info[:netmask] = $1.to_s
+            elsif line =~ /^Status:\s+(.+?)$/
+              info[:status] = $1.to_s
+            end
+          end
+
+          # Return the info to build up the results
+          info
+        end
+      end
+
+      def read_guest_additions_version
+        output = execute("guestproperty", "get", @uuid, "/VirtualBox/GuestAdd/Version")
+        return $1.to_s if output =~ /^Value: (.+?)$/
+        return nil
+      end
+
+      def read_host_only_interfaces
+        execute("list", "hostonlyifs").split("\n\n").collect do |block|
+          info = {}
+
+          block.split("\n").each do |line|
+            if line =~ /^Name:\s+(.+?)$/
+              info[:name] = $1.to_s
+            elsif line =~ /^IPAddress:\s+(.+?)$/
+              info[:ip] = $1.to_s
+            elsif line =~ /^NetworkMask:\s+(.+?)$/
+              info[:netmask] = $1.to_s
+            end
+          end
+
+          info
+        end
+      end
+
+      def read_mac_address
+        execute("showvminfo", @uuid, "--machinereadable").split("\n").each do |line|
+          return $1.to_s if line =~ /^macaddress1="(.+?)"$/
+        end
+
+        nil
+      end
+
+      def read_machine_folder
+        execute("list", "systemproperties").split("\n").each do |line|
+          if line =~ /^Default machine folder:\s+(.+?)$/i
+            return $1.to_s
+          end
+        end
+
+        nil
+      end
+
+      def read_network_interfaces
+        nics = {}
+        execute("showvminfo", @uuid, "--machinereadable").split("\n").each do |line|
+          if line =~ /^nic(\d+)="(.+?)"$/
+            adapter = $1.to_i
+            type    = $2.to_sym
+
+            nics[adapter] ||= {}
+            nics[adapter][:type] = type
+          elsif line =~ /^hostonlyadapter(\d+)="(.+?)"$/
+            adapter = $1.to_i
+            network = $2.to_s
+
+            nics[adapter] ||= {}
+            nics[adapter][:hostonly] = network
+          elsif line =~ /^bridgeadapter(\d+)="(.+?)"$/
+            adapter = $1.to_i
+            network = $2.to_s
+
+            nics[adapter] ||= {}
+            nics[adapter][:bridge] = network
+          end
+        end
+
+        nics
+      end
+
+      def read_state
+        output = execute("showvminfo", @uuid, "--machinereadable")
+        if output =~ /^name="<inaccessible>"$/
+          return :inaccessible
+        elsif output =~ /^VMState="(.+?)"$/
+          return $1.to_sym
+        end
+
+        nil
+      end
+
+      def read_used_ports
+        ports = []
+        execute("list", "vms").split("\n").each do |line|
+          if line =~ /^".+?" \{(.+?)\}$/
+            uuid = $1.to_s
+
+            # Ignore our own used ports
+            next if uuid == @uuid
+
+            read_forwarded_ports(uuid, true).each do |_, _, hostport, _|
+              ports << hostport
+            end
+          end
+        end
+
+        ports
+      end
+
+      def set_mac_address(mac)
+        execute("modifyvm", @uuid, "--macaddress1", mac)
+      end
+
+      def share_folders(folders)
+        folders.each do |folder|
+          execute("sharedfolder", "add", @uuid, "--name",
+                  folder[:name], "--hostpath", folder[:hostpath])
+        end
+      end
+
+      def ssh_port(expected_port)
+        # Look for the forwarded port only by comparing the guest port
+        read_forwarded_ports.each do |_, _, hostport, guestport|
+          return hostport if guestport == expected_port
+        end
+
+        nil
+      end
+
+      def start(mode)
+        execute("startvm", @uuid, "--type", mode.to_s)
+      end
+
+      def suspend
+        execute("controlvm", @uuid, "savestate")
+      end
+
+      def verify_image(path)
+        r = raw("import", path.to_s, "--dry-run")
+        return r.exit_code == 0
+      end
+
+      def vm_exists?(uuid)
+        raw("showvminfo", uuid).exit_code == 0
+      end
     end
   end
 end
diff --git a/templates/locales/en.yml b/templates/locales/en.yml
index 8da6a4bc5..b04a407f9 100644
--- a/templates/locales/en.yml
+++ b/templates/locales/en.yml
@@ -147,16 +147,11 @@ en:
         For more information on the failure, enable detailed logging with
         VAGRANT_LOG.
       virtualbox_invalid_version: |-
-        Vagrant has detected that you have VirtualBox version %{version} installed!
-        Vagrant requires that you use at least VirtualBox version 4.1. Please install
-        a more recent version of VirtualBox to continue.
+        Vagrant has detected that you have a version of VirtualBox installed
+        that is not supported. Please install one of the supported versions
+        listed below to use Vagrant:
 
-        Early versions of Vagrant support earlier versions of VirtualBox. Specifically,
-        the 0.7.x series supports VirtualBox 4.0.x and the 0.6.x series supports VirtualBox
-        3.2.x. Please use the version you need.
-
-        Any newer versions may not be supported yet. Please check the mailing list
-        for any announcements of newer versions.
+        %{supported_versions}
       virtualbox_not_detected: |-
         Vagrant could not detect VirtualBox! Make sure VirtualBox is properly installed.
         Vagrant uses the `VBoxManage` binary that ships with VirtualBox, and requires