To answer your question:
The 360 controller does NOT use bluetooth so connecting it to your N900 (or anything else for that matter) is out of the question. it will NOT happen. look for any PC that allows you to use a 360 controller over BT and you will likely find NONE. if the chances of using a 360 controller over BT is slim on the PC it's even slimmer on the N900. Your only hope is a wired or dongle connection to the USB port but you will then need somebody to create drivers. does the usb 360 pad work out of the box on a linux PC?
Just get a PS3 pad and avoid any trouble.

to answer your bait and switch:
I do not carry a pad but if I played alot of emulators I probably would.