but I recently saw this Dawkins talk on youtube & liked it a lot:

http://youtube.com/watch?v=1APOxsp1VFw

a much more humble approach - he sticks to conveying the unimaginable scale of the universe science reveals to us, & the limits of our ability to make sense of events occurring on such a scale.

only in the last few minutes does he slip in the atheism thing, but only as a (IMO) quite touching argument about our human need to personify impersonal forces, not by railing against the possible shortcomings or absurdities of religious believers.

I wish the God Delusion (or at least the pub. tour, I didn't actually read it) had been more like this.