The one thing that I have learned from paling around with Special Forces members (with earned Arctic Expedition Badge) is that they don't aim for "ultra light" when it comes to packing -- they go for preparedness.
Laura is ready to sign up, as her approach is very much like the military folk I have learned from (better to have MORE than LESS)(realizing that what you bring is important, as inexperience may load up the pack with useless items)
the cuben fiber worshippers over at backpackinglight.com would crucify you if you posted that view over there

I guess my distant paratrooper days in the military may be responsible that I now think a 45 pound pack is ultra light - anything lighter and I'd feel I am gambling at some end of my gear list. As long as I don't have to carry a machine gun and ammo crates up the mountain, it's vacation.