Jerry,
So far we are working with the SkyRadar units L-Model, S2 and D2. We are also currently working with SageTech to be compatible with their upcoming Clarity devices. NavWorx recently added a Wi-Fi module to connect with their units and we are waiting on a development device to test compatibility with the NavWorx units.
We are also working with Sporty's and Appareo to develop compatibility with the Stratus, however at this time they are "exclusive" to the iPad and ForeFlight. Conversations indicate that they will likely open this up in the near future.
Over the next few months you should be seeing a fair amount on new ADS-B receivers come to the market. It is our goal to connect with these new devices, however cooperation from the makers of these device is critical to our development. I hope this helps.