Google Latitude showed my friend Liz Arden near the Howland and Baker Islands, off Papua New Guinea the other day.
Cool.

Except she was in California, about three blocks from the Googleplex itself at the time.
I tried to enter my own address. Google puts me in Elfrin, FL. Or in Marathon. Or, after I put in the exact street address, city, and Zip three times, down the block at 150 Abblesnaffy Road, South Puffin Beach, FL, 33040. Their map and satellite imagery are right for that location but not for 920 Abblesnaffy Street, South Puffin Beach, FL, 33099.
And when it shows my location, it won’t show Liz Arden’s which strikes me as pretty useless. After all, I know where I am.
Latitudes and attitudes.