Very nice addition to Rails as part of the security updates in 2.3.4- an easy way to load seed data.
Added db/seeds.rb as a default file for storing seed data for the database. Can be loaded with rake db:seed (or created alongside the db with db:setup). (This is also known as the "Stop Putting Gawd Damn Seed Data In Your Migrations" feature)
I like this on several accounts, not least of which is it invalidates my previous post on the subject.
In the meantime, there are several plugin based approaches to making this work, for example seed-fu.