The folks at web-geeks.com have organized a free class for Cocos2d and iPhone SDK 3.1.2:
http://web-geeks.com/uncategorized/cocos2d-course/
It starts on Feb.15. Even if you don’t know anything about Objective-C and Cocoa, you still have some time to cram. You can actually get by with what you’ll learn from the first three chapters of this book: Beginning iPhone Development: Exploring the iPhone SDK.
See you in the class!
Er, the class is virtual, so see you in the class forum instead.