It is quite an ensemble:the guitar player was Brad Davis, a monster guitarist. The mandolin player was John Jorgenson, also an incredible guitarist as well. The rest of the band was comprised by Scott Vestal/banjo, Rob Ickes/dobro, Stuart Duncan/fiddle, and Charlie Chadwick on bass. They will also be performing on the Late, Late, Show with Craig Ferguson(CBS) on Thursday night. More shows (CMT, A&E in NYC, The View with Barbara Walters) will follow later this and next week.

I've heard some terrific bluegrass arrangements of the Beatles' "I've Just Seen A Face" with killed 5-string and mando solos, not to mention great flatpickin'. Here's a link you can get a preview of from the late, great Vassar Clements (who I had the priviledge of meeting and chatting with a few years back at a bluegrass festival)...follow the "clicky"
http://www.mp3.com/albums/482107/summary.html