Was doing some wood stove research and stumbled onto this cool little calculator. I know it's not a "solar" thing per say, but it can give you an "at a glance" overview of what it'll cost to heat your home in your area. I think it'd be a good way to supplement your solar config by finding the cheapest way to heat your home. :)
Anyhow, I thought it'd be helpful, so I posted it.