Hammerhead
Explorer
WotC is also producing a d20 Modern supplement to Frostburn as well. I think it's known as Minnesota. 
Is there any information about running entire campaigns in frigid regions, such as Iceland Dale in the FR, or winter-themed spells or class variants?

Is there any information about running entire campaigns in frigid regions, such as Iceland Dale in the FR, or winter-themed spells or class variants?