So far, I only found info for 360 controllers to PC.
Here's the one from MS: Link Removed. I presume you should be able to connect additional wireless 360 controllers, to one wireless receiver. MS does not sell the wireless receiver separately.
Then there's the wired variant: Link Removed
You might be able to locate these same products from other online retailers or the neighborhood brick and mortar specialty electronics stores.
I think PC is the best way to enjoy the video game. I have the PC and I have stored so many games in it. So for me PC is awesome way to enjoy the real gaming with it.
I agree. I have long enjoyed FPS's on PC but have recently stopped playing them as much and, well to be honest I'm now addicted to Fruit Ninja on the Windows 8 Release Preview.