From the Who Knew? files comes Ontario Sawdust, distributors of quality sawdust from a variety of wood-based products, according to their web site. I always thought that sawdust was a waste material that, while useful for many things, didn’t require any kind of specialized distribution. After all, you can pretty much make your own for free.
Ontario Sawdust says that they pick up (and pay for!) raw material, but I wonder if they’d come all the way down to Toronto for occasional donations from a home workshop. It would nicely solve the problem of what to do with the waste from my shop. The City of Toronto won’t collect sawdust as garbage, and some kinds of wood (like Walnut) will kill everything if you use them as mulch.