My husband and I were hired by Immersion Labs to do the 3D & 2D artwork for their first iPhone game - Torvo's world. I took care of all of the 2D work, including splash screens, painted backgrounds, and many parts of the main GUI system.
You can find out more information about Torvo's World and Immersion Labs via their website:
http://www.immersionlabs.com/
http://www.immersionlabs.com/