This was made using gheat to generate a nice map of locations sending spam into our spam traps.
This is just the Europe map, for full story go here http://honeynet.org.au/?q=node/41

European Megalopolis

Interesting picture. The economically very active region from south England to Milan, a.k.a the Blue Banana, is clearly visible. Also the Golden Banana from Genoa to Valencia can be seen although not as "hot" as the other one.

Or in other words: The more densely populated and economically active a region is the more spam.