USB port "monitor"

Hi!
I was looking for drivers for nokia ngage for linux but without results... then I was wondering wheter it 'd be possible to program something on my own :)
I have no previous experience with any printer/paraller/usb port programming so it's a chance for me to learn something :]
My idea is: get a program to watch what is sent to/received from usb port in windows and then deduce what to send in order to get some info :>
I know it's a "little" hardcore :D but I'd like to do this for fun :)
So the question is: Is there any program which could watch/monitor what is sent to usb port and then printing it on the screen[console] under windows? If it's quite short you may post the source here or link to it...

Thanks!

P.s. I know it's a weired idea :p