Amplitube has an Iphone app, and I likes me some Amplitube! I actually have Amplitube 3 on my laptop and went to a jam session with the laptop and my guitar because I didn't want to lug an amp out. Just plugged into the PA and the sounds you can get out of that thing are pretty amazing!
So. If you throw a cat out of a car window, is it considered "kitty litter"?