I've recently been using this "Ryan Bozis" side burner stove described in this forum:
(at the end of the first forum post there is a jpeg link where you can see a picture of the stove). It's made out of a 3 oz cat food can and weighs 0.2 oz. No pot support needed.
I found out about this stove reading Andrew Skurka's site. It's the stove he has been using on his long distance trips.
It's similar to the Supercat stove but I like it much more, plus it's easier to make, you don't need to measure anything. The only tool necessary is a paper hole punch. Compared to the Supercat, it burns slower and seems more efficient. The Supercat burns hot and fast, but does not work well with narrow pots. It shoots the flames pretty wide and I have not gotten consistent results with it, often needing a full 1 oz/30ml to boil 16 oz of water (in about 4 minutes). The Ryan Bozis stove generally takes about 7 minutes to boil 16 oz since it burns a little slower but it's a real fuel miser, I can consistently boil 16 oz with 15 to 20ml of alcohol, and the flames don't shoot out as far so it works better with narrower pots.