Just discovered the "additional content for registered users" page at The Witcher site, and I'm listening to the four MP3's they've got available. This is my fave ( off youtube):

Rootwater - "Born again"-
The other three:
Beltaine - "Bring to the Boil"-quite the medieval sound
Skowyt - "Running away"-sounds like an american band here? good cut
Lal - "They want to Suck" and they do—give it a nine on the creepiness scale.