Coal vs Wood pellets... In BTU's per ton, coal wins hands down....
http://www.ehow.com/about_5597091_wo...-vs_-coal.html
I heat my home with Anthracite coal because it's cheaper than any other fuel and I just happen to live where Anthracite is king. The linked article quotes 2009 prices. That's changed about $100.00 per ton since then. But still, I can heat my home through the winter for an average of $300.00 to $600.00. Even if we have a long cold winter.
I would expect the price to rise if global demand increased. China buys a lot of it now. Probably the reason for the jump in price in a relatively short period of time.
If Britain and the EU start burning pellets then maybe my cheap fuel will remain cheap or get cheaper. Maybe China should start using pellets too. I'm sure they have plenty of timber resources.