Since I am going through another stove phase , I thought of posting about this one :
http://www.biolitestove.com/Full_Demonstration.html
A bit like a combination of the Sierra and the Bushbuddy , the main advantage (I think...) is that it generates its own power for the fan (no batteries) and it can generate extra power to charge portable devices such as a mobile phone/GPS/head lamp...
Not out yet but it doe bring high tech to the world of portable wood burning stove.
Franco
Warning : large video file. There is a shorter version or you can just read some of the specs..
http://www.biolitestove.com/CampStove.html