Well I think if someone can come up with a good way to make a turn-based game out of cards, dice, or some other non-board game, I say go for it - make this site a little more different!

... but I don't really see how Pool would be very good at a turn-based site. As I see card games now, I don't see them being very good at a turn-based site either - but I would always be open to suggestions on how they could be! :-)