We did it. As of 10 minutes ago our initial cable (version 1) works! I am about 50% complete with the protocol reverse engineering. I am able to switch channels and get channel info back from the XM Direct / Commander. It is different then the XM PCR :( I was hoping for the simple solution and hoping for it to be the same. I will keep you posted. Once I am done I will integrate this into our current XM screen and release an Alpha 5 update.