Rails plugin that makes stamping records with a user when they are created and updated dirt simple. It assumes that your controller has a current_user method. It also assumes that any record being stamped has two attributes—creator_id and updater_id. You can override both of these assumptions easily.
script/plugin install git://github.com/jnunemaker/user_stamp.git
Add user_stamp to application.rb, like the following:
class ApplicationController < ActionController::Base
user_stamp Post, Asset, Job
If your user stamped columns and current_user method are different, just create an initializer such as config/initializers/user_stamp.rb and copy and paste the defaults above, changing them to fit your app.