Well, that didn't go exactly as planned. After 6+ months, it's always a pain to have a major error as soon as people try to use the app, eh?
Turns out the frozen copy of Rails that I included with the initial 2.0 archive was bad and it was causing rake not to work at all. I've repackaged the archive.
If you downloaded version 2.0 and had errors, please download it again. Sorry about that!