Is anybody actually using NetBeans for Ruby? I tried it very early in my exploration of Ruby, but quickly switched to gedit, and eventually emacs (using technomancy's emacs starter kit). Now that I use emacs, any other editor (particularly one that requires a hand on the mouse) feels like an RSI producing nightmare.
Netbeans has some very nice autocomplete, drop-down help, and refactoring and debugging stuff for Ruby, but I could never use it for serous code editing. I liked it for the WYSIWYG GUI editor when building some Ruby GUI apps, but much prefer vim for general coding (vim plugins for Netbeans notwithstanding).