GPS.SOS!

"GPS.SOS! is a program for Windows Mobile phones, or Windows Phones.It allows you, in some situation, to send SMS message alert,with your current location read from GPS Receiver. The Recipient will get your alert message with your known location.He can call-back and your phone will answer automatically, and turn the speakerphone mode.If Recipient uses the same program, he can view your location on the map image in a few seconds."

This looks interesting. Right from the ol' "I've fallen and I can't get up!" days. Press the button stating GPS.SOS and it signals someone that you need assistance. There's a video on their site but I couldn't get it to play for me. There's a fully functional 7 day trial so you can give it a shot without risk.  I suppose this could be useful for certain people in certain situations. If you try it, please come back and let us all know what it's like and how well it works.