I don't notice any problems from my wireless pc network. I do notice when my wife is on the cordless phone. Like between songs, you can hear this kind of quite buzzing sound. It changes as she walks around in the rooms above my basement listening room.
Can Wireless Signals Affect Audio Quality
The most convenient outlet for my Apple express wireless router just happens to be in my A/V room. Could the signal sent out from the router have a negative affect on the quality of my audio if I plug it into the same room but use a separate outlet??