I've been thinking again, in between working on eclipsefp, about writing a multi player role-playing game in Haskell. OK, I'm not going to write something the size of WoW by myself in my free time (unfortunately my day job doesn't involve any game programming nor any Haskell hacking :-(), but since I enjoyed writing Mazes of Monad, I figured that a game is a good way to learn things. A MMORPG should get me into concurrency, persistence, graphics, performance etc...
What I'm trying to figure out at the moment is what architecture to use. Mainly, if I have no doubt there is going to be a server somewhere running Haskell code, I wonder about the client. Should I try to write a browser based game coupled with a Haskell web server? That way, users could easily play the game when (if) it gets to a usable state, and I won't have to worry about cross platform issues for the client. Getting proper server side events or push should be fun, and of course if I end up using something like web sockets I will probably require a fairly cutting edge browser, which negates the advantage. I'm not too sure meddling with AJAX long polling and dynamic HTML is such a attractive option.
I'm sure everybody has faced that question at some stage. Ah well, for the moment I'm still wondering what my game will do, so I guess I have time to play with a few things before I make my mind up.