In case anyone is interested, I've created a 2.x configuration cheat sheet and put it up on github. The blog post on it is here: http://blog.anthonyeden.com/2008/08/28/rails-2x-configuration-cheat-sheet/ and the file is here: http://github.com/aeden/misc/tree/master/cheatsheets/rails-2-config-cheatsheet.rb
The sheet provides some hints as to what changed from 2.0 to 2.1 to make transitioning between those versions a bit easier when it comes to configuration settings.
Enjoy!
Sincerely, Anthony Eden
