Navigon MobileNavigator for iPhone

iLounge is reporting that Navigon has released a GPS-navigation application for the iPhone. My biggest question about the nav apps planned by Navigon (and rival TomTom) were the prices--no way were they selling these apps for $.99. The price--$70 introductory price, going up to $100 on August 15. I'll be waiting for the reviews of this and the TomTom app before laying down that kind of coin and memory space (1.29 GB required).