The video demos (you’re looking at one in the screenshot below) show what you’ll be able to do on the site. For example, you can look at a map showing where events happened during a time period you’re interested in. You also can see locations of related events, such as Revolutionary War battles.
Family historians can create family trees that plot ancestors on maps and show events during their lives, and link to photos of the area.
According to at least one Tech blogger, “The company also says they are developing an iPhone application that will show you interesting historical events near where you are at any given time.” Cool.
Joining and using WorldHistory.com is free, for now. (When I signed up for the beta test, I got a message that said I’ll get an e-mail when there’s room for me.)