I actually made the first version of this stove about 4 years ago while researching information on compact wood-burning downdraft gassifier stoves. The original version I made was too large and heavy for backpacking, but it gave me the basics for what would work for gassification (which, from what I understand, is when the burning wood is converted into gas, which in turn burns as the stove's primary fuel source. A wood downdraft gassifier burns, counterintuitively, downward, and the released gas is sucked through the bottom, pulled up through the double side walls, and released as a flame through the top vent holes. Ideally a wood downdraft gassifier should burn with blue flames, something that I have not yet achieved in my designs). When I saw Ryan Jordan's reiteration of what I thought had been the defunct BushBuddy stove, I decided to try my hand at a lighter version of my original stove. Below is the result.
The stove is made of two tea cans with airtight lids, one fitting with about a fingerswidth of space around the perimeter, inside the other.
I cut holes around the base of the big can and holes near the lower rim of the small can. Then I cut out the base of the small can, turned it over so that the can's opening was facing downward, and placed a circle of mesh at the bottom. I cut a hole in the big can's lid so that the small can fit just right, then fitted the small can and lid to the top of the big can.
The whole thing, including a titanium pot stand, weighs 180 grams (heavier than Ryan's Artic stove). It fits easily inside a 0.9 liter pot.
To stabilize the stove I can either hook two titanium stakes to the sides of the pot stand, or push four stakes through holes running through the stove into the ground.
The whole project took about an hour to make with simple tools: a pocket knife, file, metal cutter, hammer, pliers, and nail. I haven't ried it out for actual cooking yet... a little wary of coating my expensive titanium pots with the resulting soot, though that soot is supposed to make the pots more efficient...