At the RMagick repo on Github, a message was uploaded yesterday saying the main author cannot continue to maintain the project, and is looking for new people to take over. (I would certainly crash it were I to ever attempt such a job!). You can see their readme here: http://github.com/rmagick/rmagick.
In your opinion, where should a Rails 3 / Heroku / S3 app go, given that it is trying to use Paperclip for file uploads?