BTW, to me there is a HUUUGE difference between what I'll carry when backpacking (and hiking) and what I'll carry when canoe tripping or camping a bit off the main roads.
I keep things a lightweight as possible when backpacking, but for other uses I'll accept more weight.
A lot of folks out there will think its crazy to even consider carrying a saw while backpacking. In their mind if they can't break it by hand its just too big to burn anyway. Lately I'm kind of surprised by how many backpackers don't even bother with campfires.
BTW, the Unbelievable Saw does surprisingly well so long as you are careful not to get it pinched by drooping limbs. It cuts much faster than most other saws since it tends to cut on 3 sides (in an arc) rather than just one straight line. AND it is a pretty minimal package.
I haven't used mine a lot so I can't comment on its durability - I worry about all the joints and what I'd do if the connection between the blade and the handles failed.
http://www.unbelievablesaw.com/