The unfortunate answer to the Android question is that we do not currently see a way to make The Card Table cross-platform. The reason is that we are using a new feature in iOS 7 called the Multipeer Connectivity framework, which creates and manages connections between devices over Bluetooth or Wifi.
So for now we are waiting for a way to make cross-platform Bluetooth and Wifi connections possible. We do not think cross-platform Wifi connection support is worth losing Bluetooth and losing the ability to leverage the iOS-only framework that does exactly what we need it to do to make The Card Table work.
Here is some reading for you about the Multipeer Connectivity framework and iOS-Android peer-to-peer compatibility.