Hello,
I don't think so, because a standard SDK/App Store application isn't
able to run in the background, as far as I know.
Navizon needs to run in the background in order to work. If it is
possible to do this with a non jailbroken phone and the standard SDK,
then we will consider offering it through the appstore.
But we will start work on a version for the jailbroken iPhone 3g as soon
as there is a reliable way to jailbreak it.
--
Bredo Oeveraas
Navizon support