Yes, I play fiddle tunes on the bass: Irish, Oldtime, Romanian, Klezmer etc.
I also work up slap arrangements of tunes (kind of like clawhammer on the bass) Here are some links to some of my stuff I've put up on youtube etc.
http://www.youtube.com/watch?v=TPcRaJEZJLU
http://www.youtube.com/watch?v=V4NM0uKvDtQ
http://www.youtube.com/watch?v=ntpFuGWMAx4
http://www.youtube.com/watch?v=rlJuJFGkoJk
http://www.youtube.com/watch?v=y4HSsN0107s
http://www.myspace.com/jasonsypher
Cheers,
Jason