This site has biodiesel locations in the US. I don't know how often it is updated. I've also seen other "smaller" sites that keep track of local retailers. Wish someone sold it up here!

http://www.biodiesel.org/buyingbiodiesel/retailfuelingsites/default.shtm

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1983 300td 240k (down with bad tranny)
1984 300d 222k (daily driver) "Olive"
1997 GMC K2500 105k (sled dog limo)

"The scenery in ANWR is as spectacular as the Grand Canyon and the wildlife is more impressive."