Well, I would join a MP like this, assuming 1 or 2 of my current 6 MP's have finished.
I would not bet against a impossible AI winning, especially if you kept to a 24 hr turnaround, the AI would have a considerable advantage in managing a large empire over a person. Managing a 100+ province empire every 24 hrs would tax even the most dedicateded Dom 3 player.
If you are going to do a serious MP, I would say 24hr host turns 1-40, 40+ 48hr host, 100+ 72hr host. I think I could cope with that and you might complete such a game in a year or so.
