Well here’s our first video shot completely on the iPhone 4s during our coverage. At Macworld 2012, I ran into Don (again) from Schneider Optics. Here he shows me the iPro Lens 2X tele converter. When I last spoke to Don at CES PMA 2012, he had the other iPro lenses but was missing this tele converter.
This lens doubles the focal length of your iPhone’s camera. The stock 30mm becomes a 60mm in still mode and in video mode, 84mm. This lens should be shipping in a few months and is projected to run at around $100.

iPro Lens Kit – Interchangeable Wide Angle / Fisheye Lenses for iPhone.