RadRails

I'm definitely curious as well about Radrails (just started using it, but don't know all the configuration options or available eclipse plugins). As far as other options that work on windows...you might check out http://www.jedit.org/ and http://rubyjedit.org/. Jedit probably does most of what you want. Also check out this article http://ifakedit.com/log/2006/02/19/jedit-tutorial-a-how-to-on-abbreviations-superabbrevs-in-html-ruby-on-rails-and-more/ and any newer related blogs for how to make jedit more like textmate for rails.

John-Scott