This site shows Flickr’s zeitgeist. For a given day and a given keywords, it shows the most interesting photo per time segment of that day, where that very photo was taken during that exact time segment.
Unfortunately, this graph shows most people haven’t set the time of their camera correctly, so it’s not all that accurate.
And then, because of the many Flickr lookups, load-times are long.
Still, some very interesting pages can be created.
Feel free to post interesting results you came up with.
note: Due to a successful hack-attempt, the site was taken offline in September 2006.