Steve Yegge's inspiring Emacs post has urged me to finally get my ass in gear and get some work done on maintaining the Rails on Emacs mode.
The current emacs-rails mode is available from Rubyforge and I have cloned the current version of it to github at http://github.com/tomtt/emacs-rails. The github wiki has a braindump with "things i want from my rails mode". This may contain things that are already working but I will find that out as I go along :).
My plan is to have the github version be just how I like my mode, but I will push some of the things that work back into the official repository. I intend for Rubyforge to remain the authoritative site for tickets.

