Anyone seen the group stringfever? they are 3 violin players and a Cello player. I really like their stuff.
A couple of videos here:
This one is all four playing Ravels Bolero on one Cello?!?
http://uk.youtube.com/watch?v=H5MLNMgpywk&feature=relatedAnd this is their renowned 'history of music':
http://uk.youtube.com/watch?v=SG6Ef-NQCi4