I heard them on the radio a few weeks ago and have been checking them out. Very interesting, and uncategorisable - I like that!
They are fantastic IMO! I highly recommend their albums Shiny Eyed Babies, Say So and Land Animal. I got to see them last Halloween with the bands Leprous and Haken (who were both good, but Bent Knee stole the show). Their song Black Tar Water is one of the most beautiful things I've ever heard.