AuraGrid WiFi-over-cable extender

Cool idea--you plug your wireless AP into your existing cable (Coax), and then you can plug in WiFi antennas in any room that needs coverage. Only one (huge) problem: it won't work in homes that have satellite TV (they must be using some of the same bandwidth that the satellite downlink uses, or possibly it's because satellite receivers have dedicated point-to-point coax connections (not shared throughout the house)). That's a deal killer for me, unfortunately.