Locate a GSM phone anywhere...kind of

This service is new and you will agree with me, is also pretty useless. But try it, you will be surprised by the results.

Approximate margin of error:
10 metres (max.) for mobile phones in Europe and the U.K.
25 metres (max.) for mobile phones in the U.S.A., South America and Canada.
50 metres (max.) for mobile phones elsewhere.

http://www.celtascortos.org/moviles/eng/index.htm