Mormon church's Granite Mountain vault opened for virtual tour (desertnews.com)
They have got a vault carved into the solid granite of a mountain 20 miles southeast of Salt Lake City, Utah. There they store information about the births, marriages, and deaths of over 2 billion people, the largest single database on the details of the human race in the world.
Ancestry.com, a subscription-based service started by members of the LDS church, has 900,000 subscribers and is growing. In May 2007, they dumped the military records of all the soldiers who fought in all of the US wars, 90 million of them, online.