The Global Positioning Satellite (GPS) system can help you find yourself, or the nearest drycleaner, or a missing Christmas manger, or a hidden geocache. But our expectations of GPS are that it works ...

We know that the iPhone 3G will have "assisted GPS." But what does that mean? Unfortunately, there is no clear definition of this term, and of course it's beneath Apple to provide meaningful details.

Have you ever tried to use a GPS receiver indoors? Chances are, unless you were on the top floor of a wood-frame house and using a receiver with ample antenna gain, you couldn’t get a position fix.