Google makes advertizing easier

In addition, the following ad has been "following me" ever since I searched for diamonds.  I was searching
for diamond semiconductors, but the Hong Kong company "Carat" has been paying Google to advertize on
many different unrelated pages ever since then.  It has been two weeks now.  Once more advertizers start to
use this service of Google, it will change more often.  I assume that this kind of service will help Google stay
on top of the advertizing game.

On the other hand, Google has been getting into trouble by gathering WiFi information in its trucks which
document the earth.  WiFi information can be used by smart phones to determine where the phone is
located without using GPS.  This is especially valuable within buildings where a GPS signal might be too
weak to receive but a WiFi signal might be quite strong.

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