Just purchased a spot locator and I think that its a good adjunct to the survival kit.
Of the two send help functions, I think that the send help distress call that is sent to friends and family could be greatly aided by our various web based interest groups. A devote SOS index that we could have family post to, or possibly a direst link from the locator device, would serve the back-country community. Hopefully one of the local members would see the post and have the time and ability to investigate and offer assistance!
I'm planning on a similar post in the Husky-taildragger blog; See if the dog pack community is interested in self help.
If you think that this is a good idea, pass it around.
Steve