I'll wait for the TomTom solution. The car kit seems to be awesome! With BT hands free calling, built in GPS and a very cool design. Should be available in a matter of days I guess.
Does anyone know if they provide bicylce routing as well? Currently I use B.iCycle to track my rides. It's a cyclometer app with mapview and live calculation of speed, distance, calorie and altitude. But no route guidance yet. Fox News just did a feature about them: Summer Fitness Apps.
I wonder if the TomTom solution will work with the iPod touch and if yes: Will other apps be able to use the GPS of the Car kit as well?