We came across Frank's innovation in making his own Business card using a ATtiny85 microcontroller running the AVR bit-bang V-USB stack.
Impressive portray of what a geek can have as a style statement.
Complete Documentation along with schematics and code is available on Frank's Website. Check out his development for AVR based USB HID profile devices call : USnooBie. This is compatible to Arduino and can be directly plugged into the PC. Its also commercially available at Seeed Studio.