I think that I'd be interested in playing a forum game of Ars Magica.
I'm quite familiar with the rules and I have a [strike]fairly[/strike] complete book collection.
I wouldn't want a game that demands I post more than twice a week although I do expect to typically be able to post more often than that.
I've never been involved in a PbP or PbEM game that didn't collapse at the beginning and never accomplish anything of note, but I don't believe that it has ever been my fault.
Please pm me if you've room. I don't check these boards regularly but I generally do post to the Ars Magica board on a daily basis so I am around.
So what sort of game are you looking for? You may as well be aspirational while you ask.
The last couple of years have seen a handful of games start, with several collapsing quickly and a few actually getting some adventuring completed. I've noticed the number of games offered has slowed down a lot compared to a few years ago.
I'm not in a position to offer anything soon - got a couple of writing projects to finish, and then I need to plan something for this November.