I spoke to a guy at this company:
http://www.datacraft.tv/They are selling adaptors that convert the antenna cable to fit standard F connectors. Which then allows it to run over RG6. The adaptors do not impedance match or anything they just convert the connector.
He says that it works perfectly fine over the 75ohm RG6 cable and has no signal degradation even over 100 feet.
You can read more about his adaptors here:
[Link: datacraft.tv]I have yet to buy a pair of them but if they work I know we are going to use them. Running that stupid RG58 is annoying.
I also spoke with Terk, they are currently in the testing phase of a device that works as an adaptor that I believe has impedance matching.