I'll start us off with a few of the things that I do, or have heard about, to help shave some ounces. Other ideas are greatly welcomed!
Are nalgenes really neccesary? Sure you can drop them out of an airplane, but they're heavy! Hikers seems to be very dedicated to them, despite their inferiority. Try carrying 32 ounce gatorade bottles, if you swap 4 nalgenes out with these, you save yourself over a pound.
Is the lid to your pack necceasry? try leaving it at home!
How many fuel bottles do you need?
Do you really want to carry around that full length, inch thick sleeping pad? chances are you'll be tired enough by the time you get to camp you could sleep on a bed of nails. Try carrying a short riderest or z-rest. They're cheap, fairly comfy, and very light.
What about all the attachments to your water filter for fitting it to different size bottles? (mine has 3!) take the general one, and just stick the hose in your implement of hydration.
How many batteries do you REALLY need? (I bet we've all lived when we had a low beam on our headlamp, or our mp3 player died)
I have an 2.5 ounce titanium gigapower stove (one of the lightest around), yet my pepsi can alcohol stove seems to weigh nothing next to it (but nothing weighs nothing!)
Thats it for me, lets hear what you have!