This story actually appeared last week. The wrong Guy was later revealed to be Guy Goma (
http://news.bbc.co.uk/1/hi/entertainment/4774429.stm), a Congolese business studies graduate who was after a job at the BBC as a 'data cleanser'.
The real Guy later proved himself to be a nasty little bigot (on his blog) and he's been doing some serious backtracking.
The interview with 'Guy Kewney' is the funniest thing I've seen in a long time, though!