diff --git a/tasks/commit.rake b/tasks/commit.rake
index 6438f66..ab57fea 100644
--- a/tasks/commit.rake
+++ b/tasks/commit.rake
@@ -12,7 +12,12 @@ task :commit => "svn:st" do
   if files_to_check_in?
     commit_message = CommitMessage.new.prompt
     Rake::Task[:pc].invoke
-    sh "#{commit_command(commit_message)}" if ok_to_check_in?
+    
+    if ok_to_check_in?
+      output = sh_with_output "#{commit_command(commit_message)}"
+      revision = output.match(/Committed revision (\d+)\./)[1]
+      merge_to_trunk(revision) if `svn info`.include?("branches") && self.class.const_defined?(:PATH_TO_TRUNK_WORKING_COPY)
+    end
   else
     puts "Nothing to commit"
   end
@@ -39,4 +44,12 @@ def are_you_sure?(message)
     input = Readline.readline("Are you sure you want to check in? (y/n): ")
   end
   return input.strip.downcase[0,1] == "y"
-end
\ No newline at end of file
+end
+
+def sh_with_output(command)
+  puts command
+  output = `#{command}`
+  puts output
+  raise unless $?.success?
+  output
+end
diff --git a/tasks/svn.rake b/tasks/svn.rake
index 14e23c7..32fa976 100644
--- a/tasks/svn.rake
+++ b/tasks/svn.rake
@@ -54,5 +54,11 @@ namespace :svn do
       rm_r filename
     end
   end
+  
+  def merge_to_trunk(revision)
+    puts "Merging changes into trunk.  Don't forget to check these in." 
+    sh "svn up #{PATH_TO_TRUNK_WORKING_COPY.inspect}"
+    sh "svn merge -c #{revision} . #{PATH_TO_TRUNK_WORKING_COPY.inspect}"
+  end
 
 end