Take the BBC quiz to find out if you really know your : from your ;

http://news.bbc.co.uk/1/hi/magazine/3256388.stm

Which reminds me of a quote from Red Dwarf:

Rimmer: After intensive investigation, comma, of the markings on the alien pod, comma, it has become clear, comma, to me, comma, that we are dealing, comma, with a species of awesome intellect, colon.
Holly: Good. Perhaps they might be able to give you a hand with your punctuation.


EDIT: I got 6 correct.