Digital Angel offers status monitors that work with Global
Positioning System (GPS) location data. One is a pet collar with
attachable/detachable monitor, alerting you when your pet wanders
beyond the preset bounderies of your home or other location. You can
also receive a temperature alert and a low-battery alert. Alerts
will be sent to your email address, normally with GPS-data that
pinpoint your pet's location to within 75 feet.

Digital Angel also has a personal monitor, consisting of a small,
wireless clip-on device resembling a pager, and a watch. The watch
has a temperature-alert and also is a fully operational watch. The
monitor offers the above-described wander-alert, and also has a fall-
down alert. Furthermore, in case of emergency, one can press the
monitor's alert button to send a signal with one's GPS location data
to the Digital Angel Operations Center. Finally, there's a low-
battery alert.

Alerts with GPS-data are again sent to the email address of your
choice, which can be monitored by a computer, a cell phone (if it
has e-mail capability), a text pager or a Personal Digital Assistant
(PDA) with email capability. You can then use something like the
Navman GPS 3450 to turn a HP iPAQ™ Pocket PC into a mobile
navigator, with a Type II CompactFlash slot for loading streetmaps
(48 states and Hawaii).

In addition to multiple e-mailed alert notifications, a customer
care representative will contact you by phone when there is no
response to an Emergency or Fall-Down Alert e-mail notification. For
peace of mind, you can also check someone's status at any time - day
or night - on the Digital Angel website, or by calling the Digital
Angel Automated Hotline.

http://www.digitalangelcorp.com/consumer.asp
http://www.navmanusa.com/land/gps3450/
http://www.amazon.com/exec/obidos/tg/detail/-/B00009KP31/102-1834356-
9192167?v=glance

I see a bright future for this kind of service. More and more taxi
drivers have something like a Navman GPS 3450. So, in case of
emergency, you could simply forward the GPS data to a taxi service
and offer them a reward for finding the person you are monitoring.
That will probably go a lot faster than contacting missing perons at
the police station. It could work well in case of people with
medical conditions, in case of burglary or robbery, etc.

Anyone who would like to comment?

Cheers!

MCS