Three20 is really useful. It's also quite powerful. But I wouldn't recommend it to someone trying to learn/study idiomatic Cocoa. Joe tends to do things his ow

Three20 is really useful. It's also quite powerful. But I wouldn't recommend it to someone trying to learn/study idiomatic Cocoa. Joe tends to do things his own way, which works out fine, but does tend to depart from most people's Cocoa/Touch code.