[firefurby]

iGo is too much of a headache to get to work properly on the TP2.

Bing is a pretty great free alternative.

I prefer Garmin XT but that's because I have been using Garmin products for years.

Another app you might want to try is Waze. I stopped using it, but it's nice cuz it's also free and does TTS. May not read out the street names, but it does everything else.