For apps to be featured on the iPhone, developers must build it with Apple's software development kit and then apply for approval. Apple rejected the Google Voice iPhone App, and further stated that it would not accept any applications that incorporated Google Voice functionality. Apple reasoned that this app duplicates the phone's core features. It also rejected Google's location-based app Google Latitude. If you were developing a collaborative platform, do you think the best model is this collaborative model, or is the open innovation model better - if your main goal is to maximize innovation? What if your main goal is to make money?