To clarify, there is not a central HDMI hub that feeds everything. We have no idea what a customer will set up. Each will have a coax cable so you can watch HD TV over the local channels. What you do after that is up to you, but they can all take input from an HDMI source.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).