This is an interesting resource for iPhone development from an applied class at Standford.

Apple, Stanford Teaching iPhone Development for Free | Gadget Lab from Wired.com: "Apple and Stanford University this week will begin offering free videos and course materials on iPhone application development. Video recordings of Stanford’s 10-week computer science class, taught by two Apple employees, will be freely downloadable through Apple’s iTunes U educational channel. The course’s syllabus and slides will be freely available on iTunes as well."