Gizmodo. Well said.
For those who feel the Xbox 360 controller is the best controller on the market (this guy does, among many), the only solution we've had for actually using an Xbox controller on the PS3 was Ben Heck's sexy amalgamation that gutted the Xbox wireless controller, crammed in the DualShock 3's innards, sprinkled some magic and unicorn blood in it and got this wonderful beauty you see on your left.
This is, by far, the best option in terms of form and functionality (if you don't have the cunning, or cash, don't even bother). However, I lack the soldering/bread boarding skills that Ben has and the cash that anyone that's not working for retail has themselves.
I did, however, find this:
This, my friends, is the XCM Cross Battle Adapter. Simply plug this into your PS3, plug a wired Xbox 360 controller into it and shazam! Your Xbox controller now works on your PS3!
"But Tim, doesn't this cost a fortune? Plus, all my Xbox controllers are wireless."
Ah, therein lies a wonderful fact. Yes, it sells for $50, but if you're frugal, get on eBay. I just scored this adapter and a wired 360 controller for $40 shipped ($25 and $15, respectively). That's the price of a new, third-party knock-off 360 controller replica.
I'll post impressions once it arrives.