This is, of course, opinion. It is based on my previous participation in PM prior to its problems.
The original incarnation of PM was, in my opinion, a failure. Unless a new version can do better, then it is probably not worth the effort.
It was a failure, in the sense that participants never reached a critical mass and discussion rarely got as hot as political discussions can do. It was a failure because there was more political discussion in the Coffee Room at evc than in PM.
I'm inclined to think that EvC members are mostly there for the science discussion, or in some cases for the theology discussions. They see the political discussions in the Coffee Room as a kind of relaxation break from their main interest. If PM is to be successful independent of EvC, then it needs an independent membership. Perhaps the 2012 campaign season is the time to try it, if that is the aim.
If the main goal of PM is to keep the politics out of EvC, then I think you would need to force that. You would need to automatically add active EvC members to PM membership, and have EvC moderators reject political threads or move them to PM (if that could be made possible).
My own opinion - PM was an interesting experiment, but it is probably not worth reviving.
Fundamentalism - the anti-American, anti-Christian branch of American Christianity