Those interested in Kelly Kettles, Storm Kettles, Thermettes, or even Sierra and Volcano stoves might find this of interest:
http://www.trailstove.com/It's not actually much different from what I had doodled a plan of myself- it's tall enough (like the Kelly, Storm and Thermette) to create a real chimney effect, I like the shape, the legs look better than my design, and the exhaust hole and blowtube are touches I hadn't thought of.
On the downside, it looks like yet another open-bottom design (it has a grate) with the all the attendant cautions about fire hazard and fire scars.
But hey- it's lightweight, and the price is certainly right (here and there they refer to it as the "introductory" price, though it seems semi-permanent). Heck, it's so cheap that I might even try modifying one to have a solid bottom, and a lower side hole like the Kelly base, on the side opposite from the exhaust hole.