Daleks
Being a little bit of a machocist I decided to learn Objective C and Cocoa, Apple's programming language and UI toolkit of choice for Mac OS X. Daleks was/is a project to do this - a simple game based on SuperDaleks but written in Cocoa.
The good news is there's a game there and it works. The bad news is it's not even in a state to take a screen shot. It needs some nice icons, and it needs something to actually happen in the animation loop. Stay tuned...