Well the BOB is due out, mabe your have to wait a few weeks to get one but they are out, and If you mean xbox360 controllers then your missing the point , I'd rather have to pack 2 or 3 Xbox360 controller on trips, It be nice to find smaller usb devises that will work well.
Use a controller or adaptor or mod from these guys:
http://www.retrousb.com/
Good website! I was looking at them and I'm now kinda confused for it says that no drivers are required. Does that mean if I just plugged it into the BOB, it would automatically work on the GP2X?? Please someone tell me. I don't understand how a Controller can just automatically work on it.
Basic explanation: Generic driver-ish things. It'll see the gamepad pretty much how Windows sees it if you don't install any drivers. Various functions of the gamepad may be disabled(I have a pad with a 'shift' button and vibrate functionality. If you plug it in without drivers, the vibrating doesn't work and the 'shift' button becomes a regular button.), or it may not work at all. If it works, it should work with the GP2X.
I'm thinking this'll be a good reason to pick up some tiny USB gamepads. However, that will come with time, as first I need to work up the cash for the dock itself.