[coloradan]

There's only so much bandwidth that can go over power lines before unacceptable losses from radiation begin to occur. (That is, when the power lines start looking like antennas instead of transmission lines.) Even if the bandwidth below that frequency is enough for one - or ten or a hundred - broadband connections, there are typically a lot more people served by any given powerline than this. So it will work for a few people but not everyone in a city.

Second, the losses from radiation amount to a susceptibility to both jamming and eavesdropping. Care to have your passwords, credit card numbers, e-mail text and surfing habits broadcast throughout your neighborhood?

[Indy Pendance]

Well, if you're on web tv, I don't think that's a critical issue.....

[Republic If You Can Keep It]

There's only so much bandwidth that can go over power lines before unacceptable losses from radiation begin to occur

True, but not unsolvable. Radio stations have been transmitting through power lines for decades.

This has possibilities.