Some neat tools found to test wifi networks.
Great little java applications http://tools.meraki.com/
Wifi Signal Strength http://download.cnet.com/WIFI-Signal-Strength/3000-2085_4-10663562.html
Some solutions to wifi signal strength is to get router closer to your computer, make it as central in office/home to help. Get larger antenna, reduce speed from 54mb to 11mb.