This is the SPOT Personal Tracker, I just picked this up last week. They were on sale for $99.95, but was $49.95 after the $50 rebate that is available until 3-31-10.
The SPOT is a fantastic device that will track your progress, check in for you, alert family of you need help or alert 911 if you have an emergency. The basic service is pricey at $99 per year, and the tracking service is $49 per year. There are occasions where my cellular service is not available, and the SPOT is just the ticket. I can e-mail my family a link where they can track my progress in real time or I can send them an OK message at any time. The tracking will send a satellite signal every 10 minutes then it will be visible on a map where way points will be available to anyone I send the link to. I have used it the past week or so and it has worked flawlessly, here is a link to the map where you can see how it works.
http://share.findmespot.com/shared/faces/viewspots.jsp?glId=0Yq7ngC2KzIUXjtaOm7qZ8SxvpXkl1eCc
This is a map of my last weeks testing of the SPOT personal Tracker.
