@Dragonlee we have several thus far, if you go and look at the database on the front of site and use the "search games link" you can search the "social game category which will show you several multiplayer hubs, many of which include card games.
Off the top of my head, RS games has uno, go fish 1000 miles several others, whilst Quentin C playroom has rummy plus less standard games.
Then there is the blind adrenaline cardroom which is still paid subscription, which euchre, hearts and spades.
This isn't to say yours is a bad idea, just that you should probably have a look at what's available multiplayer first and try to think of games that don't currently have available versions to play, after all people love philip Bennifall's Jungle, the online adaptation of the chinese game of animal chess.
One thing that lots of people really want to see more of are more custom ccg fantasy card games like munchkin, magic the gathering, yugio etc, and I for one would absolutely love a fantasy board game to play online against other people since I've always wanted to play games like talisman or hero quest.
Good luck with the programming and I'll be interested to see what you come up with.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)
