I have been collecting some other USB devices in hopes of experimenting with various things
DLP245BM module - http://www.dlpdesign.com/usb/usb245.shtml
USBWiz OEM module - http://ghielectronics.com/USBwiz-OEM.htm
PIC18F2550 and 4550 chips - http://www.microchip.com/stellent/idcpl ... e=en010300
CP2102 and 2103 chips - http://www.sparkfun.com/datasheets/IC/CP2103.pdf