I'm working on Pathogen for the iPhone.
So far I've got Quake 3 BSP loading,

lightmaps,

controls, orthographic projection, and text rendering.

Here is what the app icon looks like:
So far I've got Quake 3 BSP loading,

lightmaps,

controls, orthographic projection, and text rendering.

Here is what the app icon looks like:
Create a custom theme




