By the way the Chemistry GCSE AQA past paper for June 2012 (and other more recent papers as well) has been removed from pretty much all the websites I can find (let alone AQA's own past paper website), but I managed to print it out beforehand.
So I think that this means that they will be using some of the questions from that paper in a similar way, so I guess anyone who saw those recent papers before they were taken off the website has a nice advantage if they can remember what sorts of questions to revise for.