Good for you! After reading your OP, I was gonna mention that you can also boost the signal strength on your router (or at least on the 2Wire routers)? by typing in the routers default gateway in your browsers address bar ? and then adjusting the power setting under: Wireless Settings > Additional Settings > Power Setting.
I've never had a 'scanning for wifi' issue, but boosting the routers power setting does help increase the signal strength ? e.g.- so you don't lose it whilst walking around your house, or out in your driveway, etc.