Morning all.
Woodgas on yahoo is a good site, they get off topic sometimes and infighting is common, but all in all, they are worth the effort.
I have both a business and personal site on the web about woodgas, I'll give you the personal site, as it has much information about the building, and problems during the build of a gas generator.
I do "teaching sessions" for those that truely are interested, it jumpstarts you righ into the thick of things for a small fee.
I've built over 50 gas generators (gasifiers) and time permiting, I generally will call someone on my nickel if they have questions.
Feel free to contact me on, or off list, or call me, and I'll return the call, (again, time permiting).
http://pages.inethome.ca/a31ford/cgcmb/ is the personal site about wood gasification.
Greg Manning