It really is going to happen this time around. Announced and demoed at WWDC by TomTom co-founder and CTO Peter-Frans Pauwels TomTom for iPhone will make its way to the AppStore shortly after firmware 3.0 goes public on June 17th!
The application is advertised to work for both the iPhone 3S and the 3GS. The application of course is the TomTom software including IQ Routes and latest maps from Tele Atlas. Going hand and hand with that application and the phone it appears the TomTom iPhone navigation kit will also be required. The kit is a specially designed car kit for secure docking, enhanced GPS performance, clear voice instructions, and hands free calling.