Navigon's gearing up for tomorrow's big day by updating its, erm, Navigon and StreetPilot Onboard apps. The refreshed software adds support for the iPhone 5's new 4-inch display as well as baking in public transport listings to Cupertino's presently underwhelming mapping offering. It's also gaining the promised "last mile" function to record the location of your car when finishing your journey on foot, sparing you the embarrassment of getting lost in the multi-storey lot when you return. The company's offering a $10 discount on its apps if you pick 'em up before October 3rd, while the in-app purchase of Urban Guidance has been reduced from $5 to $3 for the same period. We've had a note from Garmin to say that while Navigon update is now available, StreetPilot Onboard has been slightly delayed.