Another great band in this genre is Eluvietie.
http://www.myspace.com/eluveitie
I plan on getting some of their stuff soon. I've heard a bit about Korpiklaani and I must say that I am intrigued.
Another band I like is Holy Blood although they may be too intense for most people. Kinda folk tinged black metal. Free legal downloads at the link below.
http://www.holyblood.metal-forever.c...lyblooden.html
Click music, then click audio.