This really makes my day. JetBrains, the makers of the fabulous IntelliJ IDEA, are adding support (via a plugin) for Ruby and Ruby on Rails.
It was just a very brief mention at the very end of on hour long video presentation of Team Server and IntelliJ 6.
You can watch the video here. If you only want to see the Ruby/Rails part, then fast forward to about 1 hour and 12 minutes into the video.
via Richard McMahon.