### Top Story MacRuby 0.6 [is out](http://www.macruby.org/blog/2010/04/30/macruby06.html). Big new features include a debugger, a new interface to Cocoa's Grand Central Dispatch, and a rewrite of the internals of basic Ruby classes. In a related story, the early text of Matt Aimonetti's MacRuby [book from O'Reilly is available](http://macruby.labs.oreilly.com/) for free online....