Well, it's interesting: the success of our environmental consciousness means that what used to be garbage is now competed for. So sawdust, bark, and stuff that used to go to landfill--now the people who want to make plywood, the people who want to burn it, and the people who want to turn it into pulp are all competing to get a piece of it.
Certainly the use of biomass for cogeneration, for production in the plant, makes a lot of sense economically. To make it economical to actually harvest wood and then burn it for energy would probably require, at the moment, subsidy levels that would distort the marketplace. In Europe it has proven to be counterproductive.
There are exceptions. The beetle-affected wood in the west, which may not have any other economic uses, is an exception. You have to ask yourself something about our policy structure when it makes sense to change Canadian wood into pellets, ship it across the ocean and have them burn it, then call it an environmental plus.