Last week I finally got round to purchasing a macbook air, so now I have the chance to jump in and do some iphone programming.
After spending about a week orienting myself to the new environment, OS X and xcode, I started working on creating a 3d game engine. So far it's early stages, implementing simple engine code to handle 3D third person camera and object movement. ( I'll try to post a video soon )
The plan is to have something presentable by the end of the year, I'll try to keep you posted with how the engine delopment goes regulary inbetween code thrashing sessions.