This looks like it has some potential for fun. AutoTune / T-Pain app for iPhone:

http://iamtpain.smule.com/#tpain_video

Link to a sample of a kid playing with it:[media]http://www.youtube.com/watch?v=20wcdOvZihk [/media]&feature=related

Check out the comment...I am McLovin.

 

14 seconds and... i shut it off.

 

Yeah well the point of that whole video is that the kid sounds like McLovin, which is mentioned in the comments. Try to not picture his face while it's playing

T-Pain and his buddies are goofing with it on the first link.

 

is more fun

 

We already used it for a gig (we did "I'm on a boat.") Sucker works, and is more dead-on than us fiddling with all of our outboard effects boxes.

 

In some sample videos online it seems pretty accurate, and works better "on-the-fly" than some other more expensive devices.

 

I have it and it's fun to play with. Works really well.

 

Buy one of these and make the next million dollar rap video.
How? well thats easy repeat what you hear on the news.
Try it and you will see.