From Slashdot, the Mailinator Spam Map. Essentially, this mail server geocodes the IP addresses of all the spam it gets, and then plots them on a Google map. Pretty cool, but geocoding IPs is imprecise. At best it would give you the nearest big city, and at worst, it would tell you that you are in Brunswick, Georgia, when in fact you are sitting in an apartment in Rockridge. See their geocoder to see what I mean.