Power Line Networking Anyone?

I'm considering putting in Power Line Networking adapters to try and solve some network issues that I have in my house.  I'm wondering, though, how putting that signal across my electrical system might affect my audio stuff - mic pres, rack effects, instrument amplifiers, audio interface, etc.  I know this is not really a Sonar question, but I thought someone here might have some experience with it.
 
Any insight is appreciated.
 
Seth

I connect my studio (built in my garden) to my broadband router in the house using a power line, and have no problems. I even use it to stream my live radio show to the FM transmitter with no trouble. 

I have two network connections in the house for two TVs, where I watch Netflix. Neither was located in a convenient place to run a cable to, so I had no easy alternative.
 
They'll work fine, at least in a single-family home, with a couple caveats.
 
First, know that the bandwidth may be less than the main service; my bandwidth at the router and all hardwired connections is 30 MB/s but my power-line connected TVs see only about 5 MB/s - still plenty fast enough for Netflix.
 
Second, the transmitter and receiver should ideally be on the same circuit. If they aren't, there is a good chance the connection will be unreliable or not work at all. In my case both TVs and the hub that's feeding them are all on the same circuit, and it's been very reliable.
 
Third, as noted by Mr. Peterson above, they also turn your wiring into a broadcast antenna. However, this has not been a problem for me. I don't pick up any interference on my audio gear, which is physically remote from the house and on a dedicated circuit. I am able to listen to FM radio without interference, and I am able to watch TV on another set that's not networked. But other things might be more prone to picking up the radiated noise, such as police scanners or ham radios or CB radios or AM radios.
 
If you live in an apartment building, condo or duplex there's a chance you could interfere with your neighbors' devices. If that's your situation, you'll just have to try it and see. Buy the gear locally so you can return it easily if it doesn't work out.

The limitation isn't the voltage difference, but rather reactance - capacitance and inductance. Because house wiring wasn't meant to carry high-frequency signals, there are no standards for conductor/connector spacing like you have with regular network cables. And unless it's run inside conduit, there is no shielding. Conductors usually run parallel to one another so there is no common mode rejection.
 
I assume the network signal is modulated, so the bandwidth is further limited because it's based on the carrier frequency, which would need to be significantly higher than the data bandwidth.
 
And of course, the electrician who installed the wires was not thinking about inductance from tight bends and looping excess wire. He probably wasn't thinking about running conductors near fluorescent lights or electric motors, either. Because house wiring follows none of the guidelines for network cabling, it's always going to have an inherent bandwidth limitation.

Thanks for the replies! I understand it has some limitations and drawbacks, so it may or may not work for my network needs. As long as it shouldn't pollute my audio chain, though, I'm going to give it a try. Bought some adapters on sale. We'll see.