I recently stumbled across a really great opportunity for developers, remodelers, house-flippers and homeowners to save some money, go green and avoid filling up our landfills: http://www.planetreuse.com/

This service offers - for free - the ability to either post offers of building materials, or to request specific building materials.

Skimming through the site, it is obvious that it is quickly gaining popularity. Listings covered free materials that were both high quality and offered all around the country.

This is definitely worth checking out, and a much better substitute than trashing those removed or excess building materials from your projects.