I picked up a great new CD recently: Ricky Skaggs and Bruce Hornsby. It's an adventurous blending of two amazing musicians. This is good bluegrass. They've re-done Hornsby's Mandolin Rain, and it's fantastic. There's also a very interesting bluegrass rendition of Superfreak.
I'm not a country fan, but I do love some good bluegrass. Throw in Skaggs and Hornsby and you can't go wrong.