you could also try changing the channel that your wireless router is set on, many routers are set to channel 6 by default,and while this channel doesn't overlap, it seems to be the most susceptible to interference from cordles phones and a/c adaptors
channels 1 and 11 are also non overlappers ( hey i created a new word ), but just playing around should help
BTW might be an idea to have a cable to hand in case one of the channels is so bad you can't get enough signal to connect and change
HTH