The hub is pretty much the only part i'm not changing. I've wanted that hub for ever. Plus I don't need a 9speed hub, and being a SS hub, it has the wider flanges which means less flexy wheels!
And the steel cassette (where all the weight comes from) is what keeps the hub is decent condition after years of use, given that the bearings/seals don't blow out.
good thing you are talking about this, I was looking at the monstruosity of a headset there was on the bike 2minutes ago in the garage, but like I said, I need money before switching up parts!
Seat and seat-post, fork and brake to X0 might be the only place I could lose weight. wheels are pretty much the lowest I could and WOULD go. There is not much to change on that bike.. haha! HELL NO. I'm not going single speed. There is a reason I invested in the chain-guide and X0. I want my speeds.
Yeah. Chain might be a good Idea. Like I said, fork is gonna wait since I have a bunch of trip to pay for. Brake could be a good idea, but I don't see a lot of good light rear brake on here.. for cheap!
Mine were XTR so they were pretty light. I have run XT levers with XTR calipers before and they're definitely lighter than Elixirs. You might be able to find last year's XT brakes on sale.
WTBs on Hope pro2 ss rear, and a pretty light front hub. Won't go lighter in the wheels. Seat and seatpost are the next thing to go. Fork might have to wait since I have a bunch of trips to pay for!
Ça fais plaisir à entendre! Je t'ai pas oublié en passant! je suis sur quelquechose de malade donc d'ici un ou deux mois max tu vas avoir ce que tu as demandé
Laval, Quebec, Canada 
http://dchill.pinkbike.com/album/2011-Tazer-HT-geared-setup/
that Hope SS hub is a boat anchor