Bumble-B: Mini USB Development Kit | fletchtronics.net
http://fletchtronics.net/bumble-b
"So you want to build USB enabled devices. Bumble-B is here to help!
It is a breakout board for Atmel's at90usb162 microcontroller, along with supporting hardware and USB connector. It is DIP-24/600mil shape, and works very well on a breadboard."