There is a Yahoo A-100 forum.
It goes back many years, and there are good people there but it's pretty slow. I'm not a fan of the old style forums or Yahoo, but joined a couple years back for the info.
http://autos.groups.yahoo.com/group/DodgeA100/?prop=eupdateThere is also the vintage vans forum, it's got the Ford and Chevy earlys too, but good and more frequented.
http://vintage-vans.forumotion.com/forumThere is another for the B vans (71-up) that In The Pink is associated with.