Why wait ?
In Europe we have no other choice than Google Maps or Navigon. Sygic & G-Map have not yet released their European versions. I have used Navigon for 2 weeks now and I must say that it does its job pretty well. The maps are recent, the vocal guidance is very efficient and accurate, and the 3D view of some junctions is very helpful.
The only problem is a lack of sensitivity of the GPS. with the Kensington LiquidAux Deluxe kit, the Iphone is far from the windshield, so maybe it is better if the Iphone is positioned somewhere else. It is OK if I am alone in the car, but with some passengers inside it becomes very difficult to have a correct GPS signal.
To come back to the subject, why should I wait for TomTom ? Navigon already gives me what I want, and in the next release due this month they will add the possibility to prepare the itinerary & add the fixed radars. What else can Tomtom offer (without subscrition) ?