Do you know them??
Cello Metal from Finland
I really like this band
try out

Apocalyptica is a great band. Hall of the Mountain King, Toredore, Path, and their cover of Creeping Death kick ass. Cellos (or is it Celli?) kick ass.

And on the Finnish note try out Children of Bodom.

I've tried listening to some of their music... other than some of their Metallica covers and such, I can't help but feel they are a boring band... sorry. I much prefer Judgement Day. They're a "string metal" band from San Fran. They play with clean and distortion cello, violin and drums.