Here’s a cool howto on snooping your USB for linux hackers! Yes, modprobe is very useful…
Rad, Quiet Earth has a good how-to on listening in to what’s going on over USB, great for reverse engineering weird USB doo-dads… – “This is intended to be a howto to debug usb transactions under linux, or simply to reverse engineer propietary usb stuff. If you need to reverse engineer a windows only usb driver, you can do it easily running vmware under linux