Kevin Martindale has a pretty good idea for a Windows Phone app.
Microsoft Dashboard brings your mobile experience on the road. With Microsoft Dashboard, you will have the convenience of Ford sync, or the Microsoft Auto platform, right on your phone.
The application is based on a whole bunch of already existing Microsoft technology (Voice Commander, Bing mobile, Media player, etc.), meaning Microsoft will be able to churn this one out pretty fast.
If you agree with Kevin and also want this app on your phone (and with the amount of integration required, only Microsoft could do it), vote for Kevin in Microsoftâ€™s I Need This App! contest here.