ruby script/plugin install http://juixe.com/svn/acts_as_commentable/

* Make you ActiveRecord model act as commentable.

class Model < ActiveRecord::Base
acts_as_commentable
end

* Add a comment to a model instance

model = Model.new
comment = Comment.new
comment.comment = 'Some comment'
model.comments << comment

* Each comment reference commentable object

model = Model.find(1)
model.comments.get(0).commtable == model

There is currently no advanced documentation for this plugin.