http://www.amazon.com/Official-Nintendo-Wii-Wheel/dp/B0013B30SY lol. But really I've heard the logitech g27 is good and I think there's an input map for it already. If you wanna be a cheap ass you could get a microsoft sidewinder wheel from ebay for like 25 bucks and then make a input map for it.
well, depending on your budget, you could get the Logitech G27, or if you just want one that just has the nessecties (about 12 programmable buttons, a d-pad, steering (of course), and a acceleration/brake pedal) then a good one is the Genius Twinwheel F1 (LINK---->linkhere<------LINK) or the Trustmaster Ferrari GT Experience (LINK---->LinkHere<----LINK) i actually use the Genius twinwheel f1, as i got it even cheaper then its current price (cant afford a g27, or i would have gotten that) and if you need an input map for the twinwheel or the thrustmaster: Thrustmaster TwinwheelF1.
I have a microsoft sidewinder but i was looking for a upgrade I forgot about this thead. PS: I have ordered a Logitech g27