I was going to mention Nancy blake, but Marion beat me to it. Actually, she and husband Norman have recorded a number of albums together (under his name). It seems that in more recent times Nancy has been playing more guitar, but early on she played quite a bit of cello. I would particularly recommend the recordings they did in around 1979-81 under the name "Rising Fawn String Ensemble"; outstanding stuff.

You may also want to listen to some of the work that Yo Yo Ma has done in the last few years with various people, including Edgar Meyer (bass) and Mark O'Connor (fiddle). It's not strictly traditional -- more of a hybrid of classical and folk styles -- but it's a very well-crafted hybrid, and might give you lots of good ideas. These guys are such good musicians that you'll never go wrong listening to them, regardless of what genre(s) you prefer.

The cello is one of the most beautiful of all instruments, in my opinion, and I would love to hear it played more often in non-classical settings. Best of luck.