Navigon is releasing yet another significant update for its continually improving MobileNavigator iPhone GPS app, and at this point, we reckon these guys and gals should get some sort of medal for pursuing innovation on an existing product rather than leaping to "the next best thing." The latest refresh adds in three primary features: 3D terrain views, a 3D panorama view ($9.99 extra) and in-app connectivity with Facebook and Twitter. As you'd expect, the latter enables users to broadcast current position, destination and ETA to social media outlets, which should make existing Foursquare addicts overwhelmed with joy. Version 1.5.0 also throws in MyRoutes, which is said to analyze your driving habits, patterns, location and time / day in order to provide "up to three routes clearly displayed in-map with ETA, distance and driving times for each." Best of all? It's just $69.99 ($20 less than normal) until February 15th, while the real-time traffic add-on is reduced $5 to $19.99 for the same duration.