Index: activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
===================================================================
--- activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb	(revision 9248)
+++ activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb	(working copy)
@@ -426,7 +426,7 @@
         self
       end
 
-      %w( string text integer float decimal datetime timestamp time date binary boolean ).each do |column_type|
+      %w( string text integer float decimal datetime timestamp time date binary boolean uuid ).each do |column_type|
         class_eval <<-EOV
           def #{column_type}(*args)
             options = args.extract_options!
Index: activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
===================================================================
--- activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb	(revision 9248)
+++ activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb	(working copy)
@@ -144,6 +144,9 @@
             # XML type
             when /^xml$/
               :string
+            # UUID type
+            when /^uuid$/
+              :uuid
             # Arrays
             when /^\D+\[\]$/
               :string              
@@ -280,7 +283,8 @@
           :time        => { :name => "time" },
           :date        => { :name => "date" },
           :binary      => { :name => "bytea" },
-          :boolean     => { :name => "boolean" }
+          :boolean     => { :name => "boolean" },
+          :uuid        => { :name => "uuid" }
         }
       end