Here is a cool little quiz I found the other day (Excel format):
The aim is to work out the chocolate bar names using the clues provided. For example, the first clue is 'Sly giggles' and the answer is 'Snickers'. I haven't quite completed it yet but as soon as I do I'll post the answers. If you aren't from the UK the quiz will probably be lost on you because its manily based on UK confectionery but you might still enjoy it and Google should be able to help you out!
Edit (23/12/08): Answers: ...ence.co.uk/2008/12/chocolate-quiz-answers.html.