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
and any newer related blogs for how to make jedit more like textmate
for rails.