[vladev]

RadRails: http://aptana.com/products/radrails (although it's Eclipse based, so it might not be what you need).

I'm wondering how come Oracle hasn't kill NetBeans yet? Considering the effort they've put into Eclipse and the aholes they are this seems a logical move.

[jpcx01]

They've been bought by AppCelerator so I highly doubt their longterm focus is going to be on Ruby. Will probably mainly be Javascript (to support Titanium Mobile)