I love instructables site.... Here's another one that looks like it should work well..
http://www.instructables.com/id/Ammo-can-stove/
You got my hopes up on that ammo can stove.
Years ago I was in a surplus store where they had some ammo can wood stoves that were made out of larger ammo cans, but they were made like a wood stove, with door and flue and all. Like a sheepherder's stove. The cool thing was that the sections of flue pipe stored inside the ammo can. Seemed like it would be great for a tent with a stove jack.
Haven't been able to find any online. EDIT: Hadn't as of the last time I looked, which was probably a couple of years ago. I just tried again, and found lots of stuff...