It's nice that it's a small one, but every USB device will work
I didn't have any, but have an USB Harddisk (IDE).
I attached a DVD player to the IDE connection for the harddisk and it worked.
I'm not using this everytime, but only used it for installation of SP1 and Office 2007 Enterprise.
Now my HD is putted back in his case
SPL 1.40 Olipro
Windows Mobile 6.5
HTC Touch Diamond
Original NLD rom (for now)
Running Win 7 RC and liberated WM6