Here's a link to the MotoGP2 thread. There's about 5 pages of posts so far, but a lot of information and links among them.
A lot of people use a joystick with the game, but it needs to be one with a lot of buttons/controls on it. Saitex make a new one called Saitek EVO, and is pretty much like the older Cyborg that I have.
Take a look at the thread and if you have any other questions, just post it in there. I know it's in the General Forum, but it is bike related. Especially in the winter time when we can't ride.
We have been trying to race on-line together on Monday nights at 8:30pm CST. See you there if you can make it.