Turn by Turn GPS Navigation for iPhone Coming?

MSNBC recently spoke (via MacDailyNews) with several GPS manufacturers about their plans to develop a turn-by-turn GPS solution for the iPhone. While the manufacturers were unable to provide many details about their plans, TomTom reasserted that they do have GPS navigation working on the iPhone and that it works well:

We have made our navigation system run on the iPhone; it looks good and works very well, said Dutch-based company TomTom, in a statement to msnbc.com. We will have to look more closely to Apples strategy before we can say more about what kind of opportunities this will bring us.

There has been some debate about whether or not the terms of the iPhone SDK would allow such an application, but once analyst claims that when he spoke to Apple "they didnt say such applications would be prohibited." Obviously, though, there are remaining issues surrounding the deployment of such an application which Apple's Greg Joswiak has described as "complicated".

While some are speculating that Apple may be working on their own GPS navigation solution, others believe that a 3rd party solution will become available before year's end.