Perdiemco just announced an interesting location-based service that sends SMS messages to GPS-enabled BlackBerry and Windows Mobile handsets when they enter a certain zones are around points of interest determined on Google Maps. Perdiemco Location and Tracking can be handy for notifying parents when their kids are going somewhere they shouldn’t be, or if guests are close to arriving, and plenty of other applications. For a closer look, check out PLT7′s manual. To give it a shot, you can download the installer here. Thanks Josep!