So you've heard about the iPhone app store and how people can make insane amounts of money (I heard about someone with a crossword game that is making $2k a day) and you want to get in on it, but have never written a line of Objective-C or coded for the Mac before, much less the iPhone. Never fear, the Apple Blog has a nice iPhone SDK Tutorial: Build a Simple RSS reader for the iPhone. Great resource to get your toe in the door.