 This small board, about half the size of a business card, is priced at slightly more than an AVR Butterfly.It includes an AT90USB1287 with USB On-The-Go (OTG) support, 16 MB of DataFlash, LEDs, a small joystick, and a temperature sensor.The board includes software, which lets it act as a USB mass storage device (its documentation is shipped on the DataFlash), a USB joystick, and more.