When I first conceived my website back in 95, I intended to do that very same thing:
http://www.iav.com/~sponge/travel/travel.html
Never did it though because of file size of the gif mapping (at the time, a 40k page was considered bad netiquette because of download limitations) and because I got lazy.
Anyway, I probably have several different kinds of global maps tucked away in my hard drive. If anyone wants to take a stab, their welcomed to (email me). Nowadays, you can use Fireworks or another program to slice up the image and make each slice hyperlinkable.
Regarding the WSD, it might be a challege to do with so many focused in the same place (eg SoCal). I'll start toying with it for fun, but I hope others will try it.