If you've been weighing the costs of buying a standalone portable GPS unit (which costs about $200 to $300, on average) versus signing up for one of the newer, $9.99/month cell phone plans for today's GPS-enabled handsets, take note: Garmin just announced a TiVo-style, one-time-purchase plan for Garmin Mobile for BlackBerry. For $99.99, North American BlackBerry customers with GPS-enabled phones (such as the Pearl 8130, the 8830, and so on) can get unlimited, lifetime use of the phone's step-by-step voice navigation.

The fee also includes all of the other features, such as traffic, weather conditions, forecasts, and fuel prices. Verizon BlackBerrys are still not compatible with this service, since they still use their homegrown VZ Navigator and disable third-party GPS radio access. If your BlackBerry doesn't have embedded GPS, Garmin also offers the GPS 10x (pictured above), a portable Bluetooth GPS sensor. Garmin Mobile for BlackBerry's $99.99 one-time purchase is available directly from Garmin at www.garmin.com/mobilephones.