LUFA WCID Device 1.0.7z: A LUFA sample of a WCID device. Extract the directory into lufa-lib\Demos\Device\LowLevel and use AVR Studio 5 to compile. You may have to edit the makefile according to your target.
Netmon trace (LUFA WCID Device).cap: A Microsoft NetMon trace (using the USB extensions - for more details, please see this blog post) that documents the USB queries a WCID device will receive on first insertion. This trace was generated against the LUFA WCID Device sample above.