Gokivo is made by NIM (networks in motion) and is already available for 99 cents at the App store. Of course that’s not all – if you want the full navigation functionality you’ll have to subscribe to their service for $10/month.
Gokivo does Yahoo local search, can provide voice prompted navigation, and real time traffic information.
It can sync with bluetooth to your car’s audio to and also let you control your music so you can remain using the GPS navigation application while getting directions.
Oh, and one more thing – you can shake your iPhone to get alternate routes. That’s a first :)
Read more about it at Gokivo.