I love the Ikea and the coffee mug wood stoves.
I use something very similar. My latest version is made out of stainless steel and rolls up so it fits in my evernew narrow bottom 700 ml. I honestly don't use it much for cooking though. While it's great as a backup stove I usually just use it for the joys of campfire without having to gather and process large amounts of firewood or scorching a lot of gorund. After I'm done there's litterally no trace.
I like to think of mine a glorified burn barrel or a glorified fire ring. While I have experimented with forced air and wood gas. Bottom line I just love the simplicity of a single piece wood stove.
The key thing to these wood stoves is the incredible efficiency of the round designs at reflecting heat and moving air. This is what makes them burn really hot and clean.
Other factors are the
1) the cone shape... which gains some efficiency and intensity reflecting heat back down and focusing it, especially for cooking.
2) height, the more height the more convection the quicker the burn and more heat. It's that simple. Rocket stove concept. Of course the taller the more unstable, but a titanium stake or two works wonders for stability.
3) holes / airflow: Honestly i don't think one can have two many airholes. I thought about putting this to the test and making it out of mesh just to try it. Would be more suseptible to wind but it just might work awesome and would be very lightweight.
4) diameter: the bigger the diameter the bigger the sticks the longer the burn, but the less efficient
Personally I have one big idea I'm thinking about.
I'm planning to just get a nice long coil of thin titanium sheeting about 7" wide, perhaps to thin for a stove, but thick enough for a windscreen and make cottage cheese out of it. I can then double layer it and put bobby pins or titanium stakes through it thereby adjusting the diameter of the stove and making it extremely solid. It'd be able to go from 3 or 4" up to perhaps 8" across. This would allow me to vary my stove diameter based on how I intend to use it. Wether that be a narrow / efficient cooking fire or a extra wide fire.
It will also be able to accomidate virtually any size pot. Right now my fav is the Evernew 700, but I also have a kmart pot I love and I think in the future I may get an MSR Titan for winter use.
Perhaps we need to spin this off into a new wood stove thread again. ;)
BTW, I also cary a lot of MYOG. Favorite items are
1) my bicycle frame bag that fits in the main triangle of my touring bike. It's my equivelent of an UL backpack: http://www.flickr.com/photos/mmeiser2/5152657635/
2) wood stove, as mentioned above: http://www.flickr.com/photos/mmeiser2/5153270894/ and http://www.flickr.com/photos/mmeiser2/5069282169/
3) my $18 DIY wing tarp: http://www.flickr.com/photos/mmeiser2/5154616683/
And I'm sure there are a half dozen other things, but those are the big three.