Of the app categories to benefit most from iOS 4's new multitasking features, turn-by-turn navigation is certainly pretty high on the list -- after all, no one wants their route to be interrupted by a phone call mere moments before a critical intersection or exit ramp. Navigon has just posted a video showing off the multitasking compatibility in the upcoming 1.6 release of its iPhone app, and it's pretty neat -- you can switch out of the app and come back to the exact same place where you left off, of course, but it'll also continue to play voice guidance during phone calls (hopefully, you can turn that off if you find it annoying). Follow the break for the video.
