Adam Gardner wrote:

> If you're only targeting OS X, then Cocoa (via RubyCocoa or MacRuby) are 
> certainly worth a look. The advantages are numerous; the obvious 
> disadvantage, of course, being that you can't use any of it on Windows 
> or Linux.

That's far from "obvious" - plenty of toolkits port easily!

However, one Brian Marick is popping a new RubyCocoa book soon, so I likes!

-- 
   Phlip