Arduino Computers & Mobile Technology
Collin’s Lab: USB Hacking with Arduino

”http://www.youtube.com/watch?v=kfCDjwHBBuM&feature=youtube_gdata”
http://blog.makezine.com/archive/2010/12/usbhacking.html

USB devices are so common nowadays – wouldn’t it be nice to use one with your homebrew electronics projects? Equipped with an Arduino microcontroller + Host shield, pretty much any USB peripheral can be put work in your project.