This is an interesting article about a study that was done by AOL in the UK about stuff that collects underneath the keys in your keyboard and what food particles were found.
Amazing how you can take a snapshot of an entire culture's diet just by what you find in the crevasses of their keyboards! Its obvious that the british have a serious dependency problem on cookies and cakes.
Now, if they analyzed american keyboards... I shudder to think about what they would find.