Ditch that pack! You can get a 60 liter pack (as big as you should need for a week) under 4 lbs. ULA Catalyst comes to mind. Ditch the heavy water filter, my Katadyn Hiker Pro pump filter is 11 oz and Hooch's gravity filter is like 6 oz. Get an alki stove and ditch the big kitchen outfit, my alki setup with pot and fuel less than 2 lbs. Check out some of the gear lists on Whiteblaze.net for ideas. No need for head lamp and flashlight, just make sure the one you carry has fresh batteries.
I used to carry alot of water too but have figured out that 2 liters is plenty if you have your filter and have familiarized yourself with the water sources.
Great report, don't you just love the AT?