On RPOL there aren't yet any "Ongoing" RM PBP games that I have found...
the One that was going tos tart a few months ago, fell apart after the first few sessions, first because all the players felt Rail roaded by the GM, more like we were jsut listening to him tell us a story than playing the game. then he rebotted, but after 2 weeks the gm stopped posting. (I think due to ridicule from one of the players involved.)
But, Like I said, I got one I am working to start.
MY Hackmaster game has been going for a Year now, And most the time, the players involved pot daily.
We had one combat that, due to the numbers involved, took about 2 weeks to resolve.
The AD&D game I started playing in recently seems to move fairly well also.