Yes, I have shifted from "I don't believe in God" to "I believe there is no God".
I've been quite busy of late, so am only just catching up on blogs and such (and with TAM on the horizon, will be out of the blogosphere a bit more).
Any how, when I first read PZ saying "There is no evidence for God", I thought, that's not very scientific. We've not seen any evidence, but that some won't come along.
Jerry Coyne had similar, and better expressed thoughts, and challenged PZ that there must be some evidence, that, if presented, would make him agree.
Well, PZ has replied with "Eight reasons you won't persuade me to believe in god".
It's convinced me: There is, as far as I'm concerned, no god.
This also highlights one of the things I like about an atheistic/sceptical world view over a religious one: Changing one's mind when presented with a better argument/evidence etc.
Now, I might (but doubt) read a reply from Jerry, or in the expanding number of comments on PZ's piece, that makes me change my mind.
This is, of course, in stark contrast to dogma that is always right, even if it's wrong.
I never thought I'd change from "I don't believe in god" to "I believe there is no god", as, before reading that post, it seemed most unscientific. But, you know what? There is no god.