Mashable has a great roundup of five iphone visualization tools. Only some of them are Info or Data Visualization related, with the rest being Augmented reality and audio visualization tools.
Randall Hand
Randall Hand is a computer graphics programmer and news junky that's been working in the field for the last 15 years. He's responsible for visualizations generated on some of the most powerful supercomputers in the world, ytnef, mullion support in ParaView, and VizWorld.com.