Joey Arkenstat is a legend! I want to get some of his instructional materials. : )
I saw the Mule open for the Allmans in the mid-90s, but I didn't pay much attention to them. I started getting into them more around 2004 and I've seen them in concert many times. Warren Haynes is one of my favorite musicians.
I also recommend the CD/video The Deepest End (I think that's what it's called), which is a live concert featuring many of the players from Rising Low. Unfortunately, it does not include Joey Arkenstat. No Alembics, either.