Shades with a built-in LCD-based 'bar-chart' - that shows the strength of any nearby wi-fi signals.
To keep the size down, maybe the shades would be blue-tooth based, with the actual detector on a keyring or something.-- monojohnny, May 27 2006 (+) churn-- 2 fries shy of a happy meal, Sep 18 2009 random, halfbakery