I found this article on Wiki interesting, in the idea that taking apart and using waste wood pallets is a carbon negative activity, which is even better than carbon neutral: urban lumberajcking
In high school in San Diego we kids all used pallets for beach bonfires, but since then I have not given much thought to using pallets for much.
I think I need to reconsider the humble pallet. There must be a ton of uses. They do burn well. Wood is wood, and these things should not be placed in landfills.