Skejwen correct me if I mistaken but by traditional you mean a normal real card game one thats not played on computer. If yes I think making one would be quite awesome but real hard not the graphical part after all there are plenty of guys with talent around here. The hardness would be making up rules and the way of playing.
Personally if we put the card game in Fonline it should be as simply as possible and probably text based again no idea for it from me just like for the rule set in case of a real card game.