here's a really old page with some info on his Languedoc's (he's their soundman!)
http://www.phish.net/faq/guitar.html
His Koa hollowbody gets the most use and sounds amazing. He's one of the best guitarists/musicians alive IMO, but maybe I'm a little biased

Honestly I think the past few years he's been trying to build his 'legacy' or whatever - doing music that appeals to a wider audience - going the friendly Clapton route if you will. It's nice to see him get a little respect. Now where's the Cactus signature Modulus 5 string?!