I would never leave the ultralight silnylon tarp that doubles as a poncho at home- that's one of the most valuable pieces of equipment on 8bit's list. And the Ulock? Keep it. Security.
The list overall is hella light. Did I see a warm cap on the list? My single most important piece of cold weather gear is a warm hat. Gore's N2S Windstopper is a great skullcap material - compact, warm, windproof, and weather resistant.
My only other advice would be to keep some space or carrying capacity for snacks and whatever- a musette bag or something like that if your bags are so stuffed you can't pack a bag lunch in there.
Last edited by Bekologist; 05-25-08 at 01:38 PM.