The Institute for Health Metrics and Evaluation collects detailed information on global health issues, and produces a number of interesting visualizations.
How people died in 2010 – by cause, age, and filterable by sex and region:
Life expectancy in the US (1989-2009). Who knew it varied so much?
Drill-downable US Causes of Death (1970-2006)
and many many more.
An addictive collection of beautiful charts, graphs, maps, and interactive data visualization toys -- on topics from around the world.