The darker the blue the higher the fraction of foreign Facebook connections with the imperial power in question. (Facebook has not shared the underlying percentage data, just the ranking.) These closely correspond to countries or territories which were, whether wholly or in part, at one point under British, French, Spanish or Portuguese rule, as seen in the bottom setofmaps.
MessageLabs, the email-filtering company that Symantec acquired in 2008, posted a setof word maps today measuring the frequency of terms in spam emails from a random one-week sampling of junk mail pulled from the most prolific spam-spewing botnets.
One sweet new feature is the inclusion of a 2.6GB hard drive, which obviates the need to be switching SD cards when you need to change map sets (units will ship with a full setof street level mapsof Europe).