Check a new app call "I know you" just got it yesterday and its really good. basically the effect let you guess a phone number that the spectator think.
I don't want to say a lot here, but its good and its very subtle. pass the wife test!

Do you have a Link ? Okay, got it:

http://itunes.apple.com/us/app/lior-such......387?mt=8

Why this require an Internet Connection ?

Its not. buy it then you know.

Have buy it,very amazing trick, also the Firestarter Trick have Buy,genius. If you know other Undetectable Tricks,Please let me Know.

This app is ok. But disappointed. They way it is presented in the video is different than how you actually have to preform it. Also, it supports the 4th gen iPod touch but... why. You can't use it because it shows an iPhone call screen. So to me, it's useless. Also, the artwork is a bit low resolution. It won't look as clear on any current gen iPhone/iPod.

That said! The principle and production are well done. The video is nicely edited and the instructions are clearly laid out. I really like the idea behind the effect and think this could lead to a lot more usefull/universal effect.