The graphics may be a little corny, but the content in this Flash-based presentation covering US history is pretty fascinating. Take about ten minutes to view it start to finish, but you can jump around in the time line and interact with the map (via blogdex).
Sorry for the general lack of posts of late. I’m getting ready for the big shift to the new platform and a new host, so I’m trying to keep new posts to a minimum while I transition.