While I'm sure you could find some way to play by yourself, I can't imagine it would be any fun.
This website host an incredable amount of Play by Post games. Where you play by posting your actions in a thread on this board. These tend to be slow, but fun. This allows you to play even if you don't have any local gamers.
If this is to slow for you another alternitive is gaming in a chatroom, This plays out closer to the real thing, but has the disadvanges of trying to find a game that's run at a time when your gonna be able to play.
Goodluck to you, I'll keep an eye on your thread becuase i'm thinking about starting an IRC game.