http://jwbasecamp.com/Articles/SuperCat/index.html (http://jwbasecamp.com/Articles/SuperCat/index.html)
More info;
http://zenstoves.net/Stoves.htm (http://zenstoves.net/Stoves.htm)
http://www.backpacking.net/makegear/falk-catstove/index.html (http://www.backpacking.net/makegear/falk-catstove/index.html)
A clean burning isopropyl alcohol stove concept (http://www.youtube.com/watch?v=UQp1yDWCEiU#ws)
http://www.backpacking.net/makegear/falk-woodstove/index.html (http://www.backpacking.net/makegear/falk-woodstove/index.html)
This makes a very good small smoking stove if you use a couple of pieces of charcoal and then add well soaked wood chips etc.
TL
MC