Did you know there is a newsletter/magazine for RubyMotion? There is, it's called the "RubyMotion Dispatch", you can see the issues and/or subscribe here: RubyMotionDispatch.com
I edit it, and a bunch of people contribute to it. It use to be weekly, but we've been doing it almost monthly, which I kind of like as each issue is packed with good content.
I just released today's issue, #55, see it here.