Well... I work for an online casino operator, so... yeah, I've done a few things :)

But it's nothing I can open source or anything, although I have been thinking about a few basic classes for representing cards, various kinds of hands (Blackjack, Video Poker, Baccarat etc) and that kind of stuff, things that aren't at all specific to our business or our systems.

I'm not too sure by boss has an immediate grasp of the advantages of a move like that though, so I think I'll let it rest for a while.

/J