diff --git a/config/default.rb b/config/default.rb
index e8c34c204..a5cb31f6c 100644
--- a/config/default.rb
+++ b/config/default.rb
@@ -35,6 +35,9 @@ Vagrant::Config.run do |config|
   config.unison.crontab_entry_file = "/tmp/vagrant-unison-crontab"
   config.unison.log_file = "/tmp/v-unison-log-%s"
 
+  config.nfs.map_uid = :auto
+  config.nfs.map_gid = :auto
+
   # TODO fix these
   # config.vm.sync_opts = "-terse -group -owner -batch -silent"
   # config.vm.sync_script = "/tmp/sync"
diff --git a/lib/vagrant/action/vm/nfs.rb b/lib/vagrant/action/vm/nfs.rb
index 1f65e746c..30116a108 100644
--- a/lib/vagrant/action/vm/nfs.rb
+++ b/lib/vagrant/action/vm/nfs.rb
@@ -32,6 +32,7 @@ module Vagrant
           extract_folders
 
           if !folders.empty?
+            prepare_folders
             clear_nfs_exports(env)
             export_folders
           end
@@ -73,6 +74,36 @@ module Vagrant
           end
         end
 
+        # Prepares the settings for the NFS folders, such as setting the
+        # options on the NFS folders.
+        def prepare_folders
+          @folders = @folders.inject({}) do |acc, data|
+            key, opts = data
+            opts[:nfs] = {} if !opts.is_a?(Hash)
+            opts[:map_uid] = prepare_permission(:uid, opts)
+            opts[:map_gid] = prepare_permission(:gid, opts)
+
+            acc[key] = opts
+            acc
+          end
+        end
+
+        # Prepares the UID/GID settings for a single folder.
+        def prepare_permission(perm, opts)
+          key = "map_#{perm}".to_sym
+          return nil if opts.has_key?(key) && opts[key].nil?
+
+          # The options on the hash get priority, then the default
+          # values
+          value = opts[key] || @env["config"].nfs.send(key)
+          return value if value != :auto
+
+          # Get UID/GID from folder if we've made it this far
+          # (value == :auto)
+          stat = File.stat(opts[:hostpath])
+          return stat.send(perm)
+        end
+
         # Uses the host class to export the folders via NFS. This typically
         # involves adding a line to `/etc/exports` for this VM, but it is
         # up to the host class to define the specific behavior.
diff --git a/lib/vagrant/config.rb b/lib/vagrant/config.rb
index 0bfbc89e0..34d26c0bb 100644
--- a/lib/vagrant/config.rb
+++ b/lib/vagrant/config.rb
@@ -86,6 +86,11 @@ module Vagrant
       attr_accessor :log_file
     end
 
+    class NFSConfig < Base
+      attr_accessor :map_uid
+      attr_accessor :map_gid
+    end
+
     class VMConfig < Base
       include Util::StackedProcRunner
 
@@ -216,6 +221,7 @@ module Vagrant
 
       # Setup default configures
       configures :package, PackageConfig
+      configures :nfs, NFSConfig
       configures :ssh, SSHConfig
       configures :unison, UnisonConfig
       configures :vm, VMConfig
diff --git a/templates/nfs/exports.erb b/templates/nfs/exports.erb
index 026934636..e870e466c 100644
--- a/templates/nfs/exports.erb
+++ b/templates/nfs/exports.erb
@@ -1,3 +1,3 @@
 # VAGRANT-BEGIN: <%= uuid %>
-<% folders.each do |name, opts| %><%= opts[:hostpath] %> <%= ip %><% end %>
+<% folders.each do |name, opts| %><%= opts[:hostpath] %> <%= ip %><% if opts[:map_uid] %> -mapall=<%= opts[:map_uid] %><% end %><% end %>
 # VAGRANT-END: <%= uuid %>
\ No newline at end of file
diff --git a/test/vagrant/action/vm/nfs_test.rb b/test/vagrant/action/vm/nfs_test.rb
index 1bfc211ae..83609c939 100644
--- a/test/vagrant/action/vm/nfs_test.rb
+++ b/test/vagrant/action/vm/nfs_test.rb
@@ -37,7 +37,7 @@ class NFSVMActionTest < Test::Unit::TestCase
       setup do
         @instance.stubs(:folders).returns([:a])
 
-        [:clear_nfs_exports, :extract_folders, :export_folders, :mount_folders].each do |meth|
+        [:clear_nfs_exports, :extract_folders, :prepare_folders, :export_folders, :mount_folders].each do |meth|
           @instance.stubs(meth)
         end
       end
@@ -45,6 +45,7 @@ class NFSVMActionTest < Test::Unit::TestCase
       should "call the proper sequence and succeed" do
         seq = sequence('seq')
         @instance.expects(:extract_folders).in_sequence(seq)
+        @instance.expects(:prepare_folders).in_sequence(seq)
         @instance.expects(:clear_nfs_exports).with(@env).in_sequence(seq)
         @instance.expects(:export_folders).in_sequence(seq)
         @app.expects(:call).with(@env).in_sequence(seq)
@@ -57,6 +58,7 @@ class NFSVMActionTest < Test::Unit::TestCase
 
         seq = sequence('seq')
         @instance.expects(:extract_folders).in_sequence(seq)
+        @instance.expects(:prepare_folders).never
         @instance.expects(:export_folders).never
         @instance.expects(:clear_nfs_exports).never
         @app.expects(:call).with(@env).in_sequence(seq)
@@ -69,6 +71,7 @@ class NFSVMActionTest < Test::Unit::TestCase
 
         seq = sequence('seq')
         @instance.expects(:extract_folders).in_sequence(seq)
+        @instance.expects(:prepare_folders).in_sequence(seq)
         @instance.expects(:clear_nfs_exports).in_sequence(seq)
         @instance.expects(:export_folders).in_sequence(seq)
         @app.expects(:call).never
@@ -111,6 +114,38 @@ class NFSVMActionTest < Test::Unit::TestCase
       end
     end
 
+    context "preparing UID/GID" do
+      setup do
+        @stat = mock("stat")
+        File.stubs(:stat).returns(@stat)
+      end
+
+      should "return nil if the perm is not set" do
+        assert_nil @instance.prepare_permission(:uid, {:gid => 7})
+      end
+
+      should "return nil if the perm explicitly says nil" do
+        assert_nil @instance.prepare_permission(:uid, {:uid => nil})
+      end
+
+      should "return the set value if it is set" do
+        assert_equal 7, @instance.prepare_permission(:gid, {:map_gid => 7})
+      end
+
+      should "return the global config value if set and not explicitly set on folder" do
+        @env.env.config.nfs.map_gid = 12
+        assert_equal 12, @instance.prepare_permission(:gid, {})
+      end
+
+      should "return the stat result of the hostpath if :auto" do
+        opts = { :hostpath => "foo", :map_uid => :auto }
+        File.expects(:stat).with(opts[:hostpath]).returns(@stat)
+        @stat.stubs(:uid).returns(24)
+
+        assert_equal 24, @instance.prepare_permission(:uid, opts)
+      end
+    end
+
     context "exporting folders" do
       setup do
         @instance.stubs(:folders).returns({})
diff --git a/vagrant.gemspec b/vagrant.gemspec
index fd444575e..cafe8dbe8 100644
--- a/vagrant.gemspec
+++ b/vagrant.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = Gem::Requirement.new("> 1.3.1") if s.respond_to? :required_rubygems_version=
   s.authors = ["Mitchell Hashimoto", "John Bender"]
-  s.date = %q{2010-07-14}
+  s.date = %q{2010-07-15}
   s.default_executable = %q{vagrant}
   s.description = %q{Vagrant is a tool for building and distributing virtualized development environments.}
   s.email = ["mitchell.hashimoto@gmail.com", "john.m.bender@gmail.com"]