Slightly OT, but related -- On the subject of organically produced fuel, rather than another alcohol stove, I went with the Vargo Titanium wood-stove. Wood in the form of small twigs and branches is much easier to find in the backwoods than alcohol, all you need is a way to focus the heat so you don't need that big fire to heat a small pot.

In use it's much like any wood fire except that you stop with kindling size wood; you don't need a roaring fire to heat water. The stove folds flat and packs easy. When I carry liquid fuel, it's either white gas or kerosene, although for clean and quick it's hard to beat an MSR MicroRocket and canister fuel; otherwise, my back-up is small and uses stuff you can find on the ground.