My other big purchase yesterday that you have been waiting ever so patiently to find out about is BioBricks.
I know at first glance they don't seem very exciting but they really are. Thanks to BioBricks we have cut our ever growing heating bill. Each brick fits just right in our smaller woodstove. The use of the stove works to just keep the chill out of the air with our regular "heat" on 60 degrees. It also allows us to delay even turning on the "heat" for several weeks.
The BioBricks are made of compressed sawdust and therefore not only a reuse of "garbage" but also because of the compression they pack more energy i.e. heat that a typical piece of wood. It also produces less ash (which BTW is great for your garden) and contains no sap, glue, or other residue.
We were so excited to come by this product two years ago. It is kind of like wood pellets for people without pellet stoves.