Package Tracking

["Will" <westes-usc@xxxxxxxxxxxxxx>]

Does anyone know of a package tracking device/service that would use
something similar to pager technology so that a package in transit could
send a heartbeat every 15 to 30 minutes to the paging network, and the
vendor providing the service could use the location of the receiving tower
to give an approximate location for the package?   Notifications could be
sent to the package sender or receiver then by e-mail every time the
location changes.

--
Will