This is the online course Tim was talking about – http://www.shootuporputup.co.uk/2010/04/online-carb-counting/ . You need to register for it, but it’s pretty quick.
Sorry to disappoint Dave, but DAFNE already has a brother called DESMOND, he’s the equivalent for Type 2 diabetes. I’m more interested in DAVID which was a research project invented by a few of us in a bar once – Drinking Alcohol ;