Tom Tom App and Mount for iPhone.

Here is a video of a fantastic mount for the iPhone, and what from what I can see of the app, it looks pretty good as well. The mount seems to really make the iPhone into a proper gps unit, without having to luge around the second device. I haven't seen the figures on the app or the car unit, but as long as it's not insane, I would say its a good buy.

Check it: