Good article, with exhaustive ( no pun intended) details on the concept of a wood stove gassifier system–>> BushBuddy Stove Tweaks @ Backpacking Light.
I have posted instructions for a home-made version of the unit, primarily made from a 1 quart and 1 pint paint cans. I have just recently updated the construction ( July 2012) to improve efficiency.
Due to repeated inquiries from people about how to make their own stoves, I will be conducting a workshop in Camden, ME at 6 PM on October 16, 2012 through Five Towns Adult Education where I will assist participants in constructing their own gassifer stoves. All components will be provided for $10 materials charge. We will have time to practice building wood fires in them as well.