Don't laugh. I installed a port replicator in my car so I could plug my laptop into my empeg, gps (Delorme Earthmate), and a trackball mouse with one usb cable. After all that wiring I actually caught myself self thinking, "Hey... I've got a printer port...". Of course the printer would work usb but then I'd waste a port The point of all of this being that I could actually get a fax in my car.