If you get an email asking you to help the friend of an African dictator smuggle money out of the country don't fall for it.
Apparently a new "voice-enabled version" has started as well. A person in Sweden answered an online form about travelling habits, and a few weeks later recieves a call from a man in Atlanta. Apparently he's "won a 14-day cruise in the Bahamas", but he has to cover 15% of the cost himself (app. 900us$), so the gentleman from Atlanta needs his bank account...
(The guy then quickly ended the call, but some might not)
West African Organised Crime Section - things are so bad the British National Criminal Intelligence Unit has had to set up a division to deal specifically with this problem (it also provides a lot of information).