Gary, et al:
Lately I was introduced to some freeform PbPs on other sites in which sub-forums are created for each city/region, and individual threads are created for each scene. Obviously this is very different from the single-thread PbPs found here, but I did find the setup intriguing. This would be especially handy for those times when the PCs might want/need to split up, or someone wants to continue a 1 on 1 scene past when the others are ready to move on.
Have you considered the possibility of implementing something like this? The post count for a game would be the sum of all its threads, but GMs would be able to organize things by creating sub-forums and threads beneath their main one.
I'd be tempted to implement this on my own site if not for the fact that there's much greater visibility here on Paizo.