Fall 2009 Update: As to the original question -- Is a 10-15 thousand dollar gasification boiler "worth it" -- research here continues. I don't want anyone to think I am biased against gasification boilers, and I'd very much like to accumulate some first-hand experience. So I am now the proud owner of a big, green Polish mail-order Basement-Bride-of-Dr. Frankenstein boiler -- EKO-60. She ("Oxanna") is hooked up. ("It's alive, Igor; It's ALIVE!). She breaths. She gurgles. And if you feed her favorite comfort food and treat her just right, she is hot, Hot, HOT. So now we can begin to answer the $6400 question: can you get through a winter with reasonable effort, convenience, and warmth, on mostly just junk wood and blow-downs? Or rather, we maybe could answer the question if I actually had the junk wood dry and ready to go. But I did some big talking awhile back about not buying a boiler till I was 2 years ahead on hard wood. And in fact I do have 2 years of hard wood stacked up. But while I was doing that work, I neglected the junk wood side of things. So it might be spring before I get much experience with junk wood. Meanwhile, this has been an entertaining and informative thread. Thanks to all who contributed.