Powerline Ethernet - Does it affect A/C noise?


So I'm thinking about installing some Powerline Ethernet network bridges so I can get to some hard-to-reach places in my house. I was wondering if anybody had experience with this and how it affects A/C noise...does it make any audible difference with audio equipment? I would hate to counteract all the goodness that my Shunyata Pythons do with powerline ethernet stuff.

Any ideas? Any experience?
rhmmmm
I use Netgear Powerline AV+ adaptors for my Meridian Digital Media System with flawless results. No noise at all as it has a built in filter. Also, the frequency with which these devices operate is so high that it's not going to interfere with the 50-60 Hz cycle of your AC.
Here's the Netgear adaptor review:

http://reviews.cnet.com/bridges/netgear-powerline-av-500/4505-3304_7-34799068.html
I'm getting AC line noise with my Netfear Powerline 2000 model as well coming thru my high system.   You It emanates through my loudspeakers as a light uneven static.