XBOX 360 controllers for the PC?

I've been hearing a lot about using the XBOX 360 controllers (both wired and wireless) for PC gaming.

From what I understand, the XBOX 360 works with the wireless controllers via an internal wireless adaptor. Does that mean if you wanted to get a wireless version specifically for the PC, it'd be a different model, presumably sold with a USB wireless adaptor? Or does the standard wireless model have some other way to connect with a PC?

What I'm really interested in is the MS XBOX 360 racing wheel. I want to use it on the PC (and XBOX 360), do I need to wait for a version that is sold specifically for the PC?

Thanks!

What you would need is the Wireless Gaming Receiver ($20 US), though it's apparently not out yet (EBGames has a release date of Feb 6th). It works with existing Xbox 360 wireless controls.

Me too, as I already have four wireless controls.

I had to re-read to get that.

My 360 is hooked up right next to my PC. I anticipated playing four player a lot, but I only did it for a month or two after launch as everyone else is still playing the original Xbox. Sadly, I do use the controls by myself, I had to play two player alone this week to unlock a co-op acheivement in an arcade game.