Smashing magazine has a great summary of current trends in data visualization. The visualizations range from neat to visually stunning to useful. The list includes a link to Hans Rohling’s 2006 presentation, and his 2007 talk is not to be missed (be sure to watch the conclusion):
Photosynth is left off the list. But it is one of the most compelling applications I’ve seen recently. The list of examples and resources at Infosthetics is awe inspiring.