Dash is accepting pre-orders for its $600 subscription-based navigation device with Internet connectivity: Using GPS for location and GPRS and Wi-Fi for connectivity, the Dash Express constantly updates traffic data from its own sources and other Dash devices--unclear on quite how. The Dash Express combines connected PDA features with mapping and navigation. The search is driven by Yahoo Local. You and others can email addresses straight to the device. Monthly fees are $10 with a two-year contract and $13 per month without one. The color screen is 480 by 272 pixels measuring 4.3 inches diagonally. Battery life is two hours but it comes with a car adapter, naturally.