I must say I'm surprised at the intrest in bluegrass. I think it's great music. I make my way to most of the festivals in Western Washington. I can't get enough.

I like Nickel Creek as well. I forgot to mention them. If you think Chris Thile is good now, you should see video of him at 8 years old.
There is a very good documentary called "Bluegrass Journey" (I think). I picked up a copy at IBMA in Louisville and I found it to be quite good.
I also have that Seldom Scene album. It is very good.
Are there any good bluegrass SACD or DVD-A discs? I don't have a SACD/DVD-A player yet but I will if I can get some good content for it.