All this talk about trip plans leads me to believe that SPOT is missing the boat here. Their web interface and updating system is much more sophisticated than the COSPAS-SARSAT system used by PLBs. They should allow you to upload your trip plan to their website which would only be accessed upon emergency activation and given to SAR. In addition, they should establish some type of emergency fail safe that sends out an email to people on your list with your trip plan if you do not disable it by a preset time (a la Patrick Stewart's character, Mace, in the 1998 movie Safe House).