Scott lives in Santa Cruz, that looks like the back of a winery to me. He is about the nicest guy you'll ever talk to.
The cavity covers are brazilian rosewood, like the fingerboard; he typically uses rosewood accents all over the guitars, usually his knobs are carved rosewood, as well, although these are silver. He is an expert carver, hence the intricate carving on the body, scrolled horns and the handmade pickup rings, etc. He got his start carving necks for Santa Cruz acoustic guitars, which are some seriously fine instruments.
This guitar has Lollar low wound pickups, which I've never heard before.
Basically, he will do anything you want for $4500 or so ... he is a serious builder, he's built guitars for Steve Kimock and Barry Sless, I've heard he's making or made one for Warren Haynes as well. He works closely with John Cutler and Kimock on the wiring of the guitars, hence the ability to completely bypass the unity gain buffer if you want to, which Kimock likes for certain pedals in his setup, and the modified Cutler buffer with the adjustable boost when it's active for driving effects and preamps harder than you can with just a unity signal. Steve was talking to him about my guitar, maybe putting in two buffers, a CB1 (or Waldo's), and the new Jangletone and being able to switch between both, or none at all. Interesting idea.
This particular guitar was built for a guitar show happening this weekend, and it happened to be a lefty. He has a deposit from me, I'm just deciding whether to scoop this one up at an attractive price or pay more and get something like a cocobolo or quilted maple cap over some other core wood (maple, mahogany or purpleheart, maybe), with the Super IIs, and so forth. He has four basic shapes; this one is the 24-fret model. I also really like the body on his Walker Special, but it's a 22-fret guitar and I miss being able to get that high D. He also has an interesting Strat-like guitar that he built for Kimock and a new stereo guitar that is just nuts.
More examples of his work:
http://www.scottwalkerguitars.com/PHOTO_ARCHIVES.html