http://www.alternativewireless.com/...tore=default&gclid=CLKojoWU3a8CFakERQodJCZxBg
I've used products similar to this for many years and love them because:
-Very low profile, not even a hint of rice (remember those dash clip on mounts that were mini-Recaro replicas?)
-Come with many metal backings so you can use with multiple phones/devices
-You can easily pull it off if you need to and set it back in w/o taking eyes off the road
The only problems come in when your phone gets too heavy. I used a droid 2 with one of these in my spyder and it stayed in just phone under street driving conditions, even a big bump/pothole will just slightly dislodge it. Even when I put Koni's in, it remained in place. Only problem is when I upgraded to droid 4, which is a bit bigger and heavier, it flies around a bit. I think iPhone would be fine.