Google Maps Navigation to make its way to the iPhone?

Today, Google released their free GPS guidance app for Android 2.0, called Navigation. But rumor, or CNET, has it that the app will make its way to iPhone at some point in the future. Many first time users guess, erroneously, that the iPhone has a GPS navigation app built in. This could fix that, especially if the way it makes it to the iPhone is to replace the Maps app.