The site will give a quick visual on where Swine Flu is and has been reported. This is what it looks like today and lucky folks in Alaska and Hawaii appear to have been spared so far. Actually from the map you can search the world and check what type of diseases you want to track.
For this example, I just chose Swine Flu. The map is powered by Google.
The US leads the way with 65 alerts, Mexico with 26 alerts as of this screenshot. BD