These guy are bringing forward the progressive bluegrass spirit and aesthetic of the New Grass Revival and the Telluride Blugrass festival in a big way. We caught them a year ago at a free concert in Boise and were blown away. These guys have mega-chops and they get down. I was reminded of them when I saw that Robert Plant was coming through town with his new band, The Sensational Spaceshifters. I bet he nabbed the conceit from the Stringdusters, since he's really aware of and part of the creative Americana scene now, having recorded and performed with Alison Kraus, and is now in a relationship with Austin's Patty Griffin.
At any rate, the guys are burning it up, coast to coast. Here they are performing "Black Rock" in 2009. I think there have been a couple personnel changes since then, which you can learn about at their website.