> What I need from an IDE is a debugger!  Even if it were as simple as the 
> ability to place breakpoints, step into and over lines of code, display 
> evaluation results (like what IRB does), and list variables in scope.

You don't say if you have Visual Studio. If so, you can try out our Ruby In 
Steel IDE. This has breakpoints, watch variables, locals, autos, step 
into/over, run to, evaluate in a command window, syntax error location plus 
code colouring/collapsing, Rails development tools etc. Not yet IntelliSense 
but we are working on that at the moment...

Download the latest here: http://www.sapphiresteel.com

best wishes
Huw Collingbourne