So, while I'm thinking about virtual CCGs that cross card gaming with established computer-gaming genres: Magnant is a real-time strategy game driven by card play. The CCG haters among you will be happy to know that any and all actual trading is not implemented yet. The geeks among you might be interested to hear that the engine driving the RTS portion of the game is open source - the Mac users will note that the above means the game is cross-platform. Plus, it's got ants. You like ants, don't you? [Update: there is not, in point of fact, a Mac version yet. The engine is portable, so it should happen, in theory.]