It looks like development for the RadRails plugin for Eclipse has stalled and the key contributors are flat out working on a startup venture. Who can blame them we all need to eat. So the search for an alternative Windows Ruby\RailsIDE has started. I’ve read a log about textmate/, the mac os editor and was curious why they never offered a Linux/Windows version. Well the power of textmate has come to windows with .e-texteditor.
I just downloaded it the demo version and first impressions are very positive indeed. Not enough there yet to move me from Eclipse but it is getting there.
You should take a look at it.