
A few observations:
(1) The campaign is quite innocuous - the message on the adverts simply says "There's probably no God: Now Stop Worrying and Enjoy Your Life."
(2) The campaign was occasioned by a thoroughly non-innocuous one by some Christian nutters, that included a URL taking you to a website that advised that non-Christians "will be condemned to everlasting separation from God and then you spend all eternity in torment in hell … Jesus spoke about this as a lake of fire prepared for the devil".
(3) The comment thread following Sherine's piece is mostly depressing reading. Anti-atheists grousing and grumping away, suggesting other uses for the money, and also -- it seems to me -- missing the point by complaining that nobody has been made into an atheist by the adverts.
It seems to me that the point of the adverts is not so much to make more atheists, and to make existing ones feel better. And this is worth doing. My mate Dave has spoken publicly a few times in defence of atheism, and on every single occasion some pro-God idiot has insisted that atheism is equivalent to Satanism, that atheists are opposed to all morality, etc., etc. That this is obviously fallacious self-serving dishonest hateful rubbish appears not to concern the religious. Atheists aren't Satanists - they don't have ANY imaginary friends. If you need a magical imaginary friend to be the basis of morality, then YOUR imaginary friend needs one of her, or his, or its own too, and so on ad infinitum. Being an avowed atheist is a ticket to ongoing, ignorant, bigoted abuse and this make a morale boost a fine thing. And maybe it makes some waverers feel a bit better about crossing the line - that would be good too.
Freedom of religion includes freedom to have no religion at all. People who have no religion are entitled to spend a tiny fraction of their money on advertising if they want to. And that is all there is to it.
Added 11 January: The Official Campaign Website has plenty of stories and pictures.