22lbs is do-able seeing as last years S-Works FSR weighed in at 23lbs. Like Toninator said an expensive set of wheels could cut a LOT of weight, cranks, you could shed probably a pound, maby a pound and a half if you went to a SID fork, XTR cranks would shed a lot, tires, seat, stem and handlebar. When it comes down to it though it'd cost you far more to get it weigh less than what you paid for it. The frame might limit how light you can get it since Specialized puts head tube gussets on the stock frames where they dont on the S-Works. Good for strength, bad for weight