iPhone/itouch RC applications... Ideas please!

Hey guys :). Do you guys have any cool RC aplications or anything? I have a gearing app and also found one called lipolog that you can enter ur battery data and then it gives a bit of a graph of you battery life and stuff...

I was asking if the fella made any other stuff for cars and trucks and he then asked what I was looking for and he'd see what he can do about creating some!

So I'm stuck for ideas now.. So what useful apps do you guys wanna see out there??