Learn to write "real" Mac OS X applications in Ruby
The first in a series, this screencast covers view controllers in iPhone OS.
The second part of our coverage of view controllers.
This screencast introduces UIKit and the palette of built-in classes it provides.
I built moochbot to help you keep track of things you lend and borrow with friends, family and colleagues.
To learn more, check it out at http://moochbot.com