I couldn't find this link on the HAMB, but I thought the cars were definitely worth a look: http://www.darkroastedblend.com/2011/12/american-concept-cars-showcase-part-2.html I'm not affiliated with the site, just found it on the web.
Thanks! I lost my Favorites list and that was one of the sites I couldn't remember. Always cool stuff.
I should have posted part 1. Here it is: http://www.darkroastedblend.com/2011/06/american-concept-cars-showcase-part-1.html