It all depends on the budget really, the biggest weight savings I see ATM are probably hubs, rebuilding wheels with Extralite Hubs would save at least 150g, R2 sells hub sets as well as whole wheels (even under 1200g) but they cost arm and leg. Extralite headset is a good option (their topcap is nice as well) and their stem would help too [http://www.extralite.com/Products/HyperStem%20O6.htm]. Big savings can be made with seatpost/bars in your setup contacting Schmolke would be the best bet, they ask premium prize but can everything according to your needs and still freaking light (
http://www.schmolke-carbon.de/carbon/carbon_uk/index.php ). There is also around 50g to lose on crankset (Tune Blackfoot or THM Clavicula come to mind). Pedals are individual thing and with your 220lbs Ti spindles are probably out of questions, yet even steel Speedplay or Bebops come at around 210g [
http://www.speedplay.com/index.cfm?fuseaction=home.zerospecs ;
http://www.vpcomponents.com/product/bebep-pedals-cro-moly/]. You could also ask these guys making aftermarket CB spindles if their weight limit is increased compared to OEM [http://stores.ebay.com/tispindle?_trksid=p2047675.l2563]. If so, you could get pedals as light as 150-160g after some tuning. I understand your concerns about breaking power, the light yet still powerful combination is Formula R1 Racing + Hope Floating Rotors X2. Going with XTR should be pretty safe too. Saddle is another personal thing, but you can find quite a lot of saddles in 50-70g range (probably R2 is a god place again). Finally, bolt tuning (steel-> ti/alu/nylon/carbon bolts where applicable , old but nice guide here
http://weightweenies.starbike.com/articles.php?ID=16). I'm not suggesting new frame since it's chinertown
Briefly, that would be it.
