[garethjenkins]

Hey -- as per comment elsewhere in the thread, check out https://www.deckbound.com

We're (I'm the founder) doing what you've outlined. Though the Deckbound-specific games are proprietary, the APIs and services are open -- and you can use the Deckbound card identities to make your own games. Ultimately we plan on p2p game clients as well -- and are building on top of other projects to deliver that.

G.