To date, we would setup a couple or three APs to keep the home covered by the wireless signal and force out the competition.
There is however, a method that will enable us to focus and enhance our wireless signals within the house and virtually eliminate internal wireless signals passing outside of the house: The Cylindrical Parabolic (Wikipedia) Reflector:
One can make one: Parabolic Antenna Template.
Wireless Pattern with Parabolic Reflector
Or, one can purchase one: Tritium - Flatenna.
We will make a couple up for the home installation to see how it works as we have 13 competing APs in our own neighbourhood ... many of them unsecured.
Thanks to Scott S-A of Roderick Scott Corporation for pointing us down this particular path.
Microsoft Small Business Specialists
*All Mac on SBS posts are posted on our in-house iMac via the Safari Web browser.