Julian Baggini, one of the contributors to 50 Voices of Disbelief: Why We Are Atheists, has written an interesting article on "belief in belief", a phenomenon that he condemns pretty much unequivocally (like me, he allows for exceptional cases where self-belief is necessary; in fact, I'd go a bit further in making these kinds of exceptions to strict epistemic probity or intellectual honesty).
There's a sting in the tale - right at the end, Julian reminds us that we all need to avoid weaknesses of intellectual dishonesty. Atheists need to be careful not to fall into a "belief in unbelief". I'm not sure who or what he has in mind here, but it's true that we need to avoid a knee-jerk atheism that assumes all ills will be cured if only religion will go away. Obviously, it ain't so simple.