Let the hive mind of Engadget get that for you.
"What is the best wireless surround sound speaker solution? I have a home theater where running wires is just not feasible. I have my own speakers, so I don't want a system that has speakers with integrated wireless. I've done a far amount of research and have only come across a few companies that even offer a reasonable solution: KEF, Kenwood and Rocketfish. Is there anything else out there? What do you recommend? Thank you!"
From the article:
"We are also doing advanced grooming, which allows us to get an average of 2.5 HD channels per QAM. If I have satellite channel, I can get three to one but if I have an off air channel I can only get two to one. So it is some combination of three to one or two to one that gives you an average of 2.5 per 6 MHz channel."