With all the interest in the Whomobile's whereabouts, when my wife stumbled across this site, http://freespace.virgin.net/dr.dean/, that is dedicated to Bessie, well, I just had to post it here because many people probably have not see it yet.
The site gives all sorts of info on Bessie: history, technical info (of the actual car, not the "Doctored"-up version), etc. And since Bessie doesn't have her own thread on here... yet... I thought I'd put this into the Off-Topic But Related section. (And if the Mods feel this should go into an actual Bessie Thread, I'm sure one of them will relocate it.)
So check out the site! It could be a wealth of info for someone who (PUN!) is trying to, or thinking about, building a replica.
Dino.
EDIT, 22 April 2018: Original link above is defunct. Info can still be found here:
Bessie Info Site: Web Archive Pages.