On the anonymity thing - I guess it's up to the winners. They are going to have to sign up to having the photos and names made public, so they won't be able to be completely. I guess if they don't want that linked to their mumsnet persona we can always give them a pseudonym..
Guess it will then be up to the winners to maintain that pseudonym/anonymity if they want to. Should be interesting to see who can keep those marracas quiet