The iPhone is the hottest gadget of our generation, and much of its success has been fueled by the App Store, Apple's online marketplace for iPhone applications. Over 1 billion apps have been downloaded in the 9 months the App Store has been open, ranging from the simplest games to the most complex business apps. Everyone has an idea for the next best-selling iPhone app--presumably that's why you're reading this now. And with the release of the...