I'm currently working on an Android ATC-game (approach/departure control). Trying to make it as close to a simulator as possible, with the limited interaction and screen real estate an android device offers. Will probably work better on pads/tablets than on a smart phone; Im running it on an HTC-Desire though (fairly large screen smart phone), and it actually seems work out quite ok.
I'd love to have someone help me test it/give me some feedback. Especially since I have no real world ATC experience, I build it from what information I can find on the net, it'd cool to get some input from someone who's actually seen a radar screen..
Let me know if you're interested, I'll see if I can set something up.