Robby Russell has interviewed Derek Sivers and Jeremy Kemper about the Rails rewrite of CDBaby.com for O’Reilly. A choice bit from Derek:

I was already studying Martin Fowler’s books like a schoolboy, ingesting the lessons while preparing for the rewrite. Then when Tobi really showed me Rails I got it : by sticking with Rails’ conventions, I would be already working by these best-practices I was aspiring towards.