We're excited about the Goko platform and the opportunity it provides for HTML5 game developers in making it a little easier to develop multiplayer games for multiple platforms and devices. Check out the video for a short overview of what the folks at Goko are doing:
Also worth mentioning, there are a few other great games available on Goko's site that you might enjoy: Dominion (I would love this fantastic card game a lot more if my wife didn't always beat me so easily), Forbidden City (an elegant game by Reiner Knizia), Catan World (Settler's of Catan with a multiplayer twist), Treasures and Traps, and Race for the Galaxy.