TreoSpot, Location Based Profile App
TreoSpot is an interesting, yet oddly named, application for GSM Palm OS smartphones. Odd in that it only works on the GSM Centro. The developer describes it as a Location Based Reminder and Phone Profile Settings utility. Once you set up the TreoSpot location database (from the cellular tower ID's I presume), you can enable alerts and phone profiles when you are in a specific area. It's quite an impressive piece of work for a device without any native GPS capabilities.