IIRC any Games for Windows Live should support it from the start.

I have

a wired
-> no prob, it's plug and play

a wireless
-> didn't manage to see it with bluetooth (as others said RF that seems normal)
-> the play and charge kit charges it.... the PC does recognize it... but I can't use it, the green light keeps spinning.

too bad these were not out when I bought my other PC controler that just doesn't work well...

You need special wi-fi receiver for x360 wireless pad.

If you have Vista you don't even need to download drivers.

I connected my wireless controller via the play and charge kit, battery removed. Vista automatically installed drivers, but my laptop failed to see the controller. Then I installed these drivers.

http://download.microsoft.com/download/0/0/f/00f2a67b-e10b-43b1-8cca-3deb12218f75/Xbox360_32Eng.exe

Windows says it is working properly, but I am trying to get it to work with IWBTG

( http://kayin.pyoko.org/iwbtg/downloads.php ) and it still will not work. It is also not listed as a controller in the Control Panel. Ill keep trying but help would be nice.