This is a simple input field auto completion example for Rails 3 using the JQueryUI Autocomplete plugin.
$ bundle install
$ rake db:migrate
$ rake db:seed
$ rails server
Go to the root page of the application and type s to the search field.
You might experience routing errors like ActionController::RoutingError (No route matches [GET] "/assets/images/ui-bg_inset-hard_100_fcfdfd_1x100.png"), that's a Rails 3.1.0rc5 bug.