stick adapter in electric outlet and voila a new network node.
no idea on price but agravation? priceless
Depends on your definition of agravation.
The problem with that setup is that I'd be willing to bet it radiates so badly that it'll make my Ham Radio gear very unhappy. The regular 802.x stuff is pretty harmless to my HF / Shortwave operation. Something tells me I'm asking for trouble trying to use the house wiring as "network cable".
I've had enough trouble just getting network kit that didn't cause RFI to my other hobby. Don't think I want to open another can of worms. A wired network with shielded cable is much less prone to radiate and cause havoc, not to mention the havoc I could cause to the network with my transmitting gear.
Reminds me of the recent technology they were thinking of using on overhead power lines to give people broadband. If that ever sees the light of day near me, I'm sure it'll be "interesting" to say the least. ;-)