Recommendations?

Yonder Mountain String Band has been my favorite band for several months but I never really looked at any other bluegrass bands beyond them. So now, I ask your opinions on some bands that are similar to these guys.

Thanks

EDIT: and don't name jam bands like moe. or String Cheese Incident, I really just want some more bluegrass jam bands

 

I don't care what anyone says, get the O Brother, where art thou soundtrack. It has some real soothing melodies on it, and in fact is what turned me to Bluegrass, well actually Allison Krauss did, but hey, shes on the album

 

sam bush jerry douglas bela fleck

 

I really like Railroad Earth, South Austin Jug Band (they do a great Little Wing),Hot Buttered Rum String Band, The Wilders (great old-timey tunes)... also check out some old New Grass Revival...