*floats in from the cieling* also, it might not be a bad idea to personally seek out a DM and ask him to run you through a solo "tester" just to get your head wrapped around the PbP process. its fairly light in terms of DM workload, so I'm sure a few out there will be willing to do it for you. Not a sure bet though.
I'd recommend asking lots of questions of the DM and getting deeply involved with your application process. Its hard to turn someone down that you've really come to know throughout the Ad process. DM's tend to lean towards familiar faces. After all, if you have no love for a player, how can you love their character?