I just finished this book, but I'm not a convert. I was already an Atheist when I started.
I think the most important contribution Dawkins makes, and the most controversial, is the idea that we shouldn't be complacent any longer about peoples' supernatural beliefs. In his NOMA argument on pg. 54, he says that science has always taken a laissez faire approach to people's religious beliefs. That such beliefs lie beyond science and the two don't overlap. This is where Dawkins converts me. We give religion a free pass, but why should we?
He makes the point somewhere that these are our doctors, lawyers, congressmen. They are running our world. And they still believe in the Easter Bunny.
I, for one, think our electorate should be held to high intellectual standards. In the U.S. there's this idea taking root that we are a Christian nation. This is absolute b**crap! Our founding fathers were, for the most, deists, which is an agnostic sort of belief, a lot closer to atheism than Christianity, I dare say.
The other really important thing Dawkins has to say is that those who are taught that unquestioned faith is a virtue are truly missing out on the beauty and wonder of the universe and the world around them. An understanding of evolution opens up the narrow window that we see through. Unfortunately, this message will be lost on true believers because they want to believe and that's that.