I meant to do this when I made the first post. Here you go:
It's a little hard to tell from the first pic, but it's angled perfectly towards the driver. The mount I got for my iPhone is supposed to work for iPhone 3G/3GS with cases, but my case is pretty thin, so it can tilt a little bit (isn't wobbly, though). iPhone 4 models in slim cases fit perfectly. The mount is also on a tilt/swivel base to get it in just the right position. It locks down with a screw once there. The mount is also width adjustable for other phone/device models.