Xbox Live

You may know Steve Demeter as the developer of the hit App Store game Trism, but lately he's been working on something a lot cooler that could be a game changer in the ever-growing iPhone game industry. It's called Onyx Online, and it's an a score keeping service that lets users keep an online profile with their scores in different iPhone games, as well as track of their scores of their friends.

Microsoft is probably not going to create an Xbox Live app for the iPhone, but they are letting third party developers fill the void, so there won't be a shortage for you Xbox fans. Their only restriction, however, is that they are not allowed to charge money for it, but have to offer it for free.