Could North Koreans get wireless internet through the power grid?

Until I saw this linked at Instapundit, I had no idea that it was possible to plug a router into an electrical socket, tap into the electrical grid, and get wireless internet service in areas where the signal is usually weak. Exploring a bit more, I found this customer review, which gives some idea of the performance capabilities:

I loved my network-able Blue-ray player I purchased, but I hated the wireless adapter which left me always praying my Netflix or U-tube content would actually play. Same with my networkable TV, I’d always lose the radio or the news. My PS3 online gaming was a joke wirelessly. I dreaded running a network cable from my livingroom into my bedroom. Such a downer for such great products.

However, I found this little device and AMAZINGLY everything works flawlessly! It’s literally plug and play. High-speed networking that’s virtually wireless!!! You need one on your router end to plug “wire” a Cat5/ethernet cable into and one for wherever you want to have a “wired” connection for your equipment. You use a Cat5/ethernet cable to “wire” your components into the Monster PowerNet which is plugged into the wall. No cables between rooms, only between your router to PowerNet which plugs into the outlet and one from your components to the PowerNet 200 or 300.

You may have to reset your components from wireless to wired, but after that, it just works! NO more jagged netflix, waiting for info to load, missed songs or slow online gaming. It actually downloads the best quality off netflix. I’m really happy with this. I’m used to wiring and setting up computers, home theatre, and complicated set-ups. I was really amazed at how easy it was. [link]

Some obvious questions come to mind:

* Would this still work if the power grid isn’t actually carrying juice (see masthead image!), provided the wires aren’t cut?

* Would this system be able to carry a signal that was broadcast from South Korea, or would it be necessary to surreptitiously link into the North Korean power grid?

* Could this same concept could work by tapping into North Korea’s “cable radio” network, by which I refer to the ubiquitous telescreen-style propaganda speakers?

The customer reviews seem favorable. If anyone out there has the technical expertise to explain the potential of this idea, please e-mail me or drop a comment.