OK, so we have seen "Ethernet over power" devices. In my home there is one with the "BT Vision" (its a UK thing). But I was wondering, does the input protocol of the signal in, allow you to send your own signal? I can understand if it can only send discreet digital signals, so analogue is probably out of the question. I'm sure you are all wondering what I mean. Well although my idea is for something completely different, involving a camera, and a mains powered reloading BB gun, I will appeal to the SPY cam enthusiasts, who are often very clever with lots of ingenuity. So you somehow manage to secrete a Spy-cam in somebodies stereo. How do you access the video? well there are 2 ways. one is to store is locally, this is limited by how bigger storage you can afford, and the limit of the device. The ones I know are normally limited at 4GB or so. The other way is to use my suggested way, locate the AC input of the Stereo, implant the AC part of the "Ethernet over power" onto it, then plug the USB device into the Ethernet part.(probably with some kind of mods). Then at the computer in question, connect the output to your computer, there is bound to be a 5v supply inside the stereo, but if not, there are plenty of 5v regulators available. what does the community think?