Recently, I found this amazing website : Twittervision .
It was great: let me tell you why.
It gives you a real time geographic visualization of posts submitted to Twitter. The moment anyone adds post to Twitter, you see the title of the post at the location on the globe along with the name of the person. Just click that and you could read the entire post.

The website has another benefit of advertising itself. Just check it out for 5 minutes and you realize how many people are using it and uploading their work around the world.
After its success, they made Flickrvision. This is even more interesting. The only difference is that it shows images instead of posts. I have checked it many times and find it quite interesting to see the beautiful images being uploaded by people all over the world(a good way of killing time!).
In fact, there is a Macintosh screensaver which shows flickr photos uploaded by everyone on a world map.
Now that yahoo has acquired flickr, the yahoo photos have to be moved to flickr.