Drum Machine On The Iphone

[youtube http://www.youtube.com/watch?v=kzro3XybAQw&hl=en&fs=1&rel=0&color1=0x006699&color2=0x54abd6&hd=1]
Wow thats pretty cool would be really fun to just make beats when on the train/plane etc. Its called the Fingerbeat Drum Machine.