So far I haven't found any options in the US for a phone with maps installed on it. The navigation services offered require you to have both a GPS signal and a data signal. I'm not likely to maintain a data signal in most of the places I ride. I'm looking into PDA applications now, but they don't seem to show much promise either. Guess I'll get something basic and wait for the Garmin phone. Being that they don't have a carrier yet, I bet it will be pushed back to 2009
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