Teensy USB Development Board
http://www.pjrc.com/teensy/
The Teensy is a complete USB-based microcontoller development system, featuring a 16 MHz AVR (AT90USB162) processor, in a very small footprint! All programming is done via the USB port. No special programmer is needed, only a standard "Mini-B" USB cable and a PC or Macintosh with a USB port.Arduino Diecimila / Burning the Bootloader without AVR-Writer
ponderTeensy USB Development Board