I've always heard that burning pine and other soft woods will gum up the works. Here in the Sierra Foothills, a lot of people have pine on their property and give it away. Is their a disadvantage to burning pine, other than it will burn fast, and not as hot? Check out this Craigslist ad for free wood, that's a lot of wood, and a lot of work!. (broken link removed to http://sacramento.craigslist.org/zip/2893378847.html)