In trying to ponder how to make a Play By Post D20 game work, it occured to me to check something out. Back in the day (I mean when I was 18, 6 years ago!) there was an RPG site called Rondak's Portal. This site was all about Play by Post. I thought it was awesome. It had a dice roller that would automatically send your results to the DM, a map system, chat rooms, forum, everything to make Play By Post work.
So, out of boredom and curiousity, I went to check it out. www.rondaksportal.com.
IT STILL EXISTS! 0_0
Looks just like I remember it too. I may just end up using that rather then a forum. HMMMM