The ad is pictured here.
Hemant Mehta writes in his blog Friendly Atheist (a blog that I read and enjoy daily):
I like it. Short and sweet and pro-atheist instead of anti-religious.
Well, I like it, too. And I agree with Jefferson. Questioning is essential to well formed faith. So the ad is very pro-religious as well.
I believe in you, too. But I also believe in God. Great ad.