I have not seen one of these in person but they look interesting. High-efficiency, low pollution, and no need to split wood.

http://www.greenwoodfurnace.com/

And here's a general site on wood heating

http://www.woodheat.org/

Usual disclaimers...

Steve
_________________________
"After I had solaced my mind with the comfortable part of my condition, I
began to look round me, to see what kind of place I was in, and what was
next to be done"