Since one of my favorite godless blogs is trying out this "open thread" thing, I figured it was time for me to take the plunge.
It's just an opportunity to say whatever you want via a comment. Or comment on a comment. And so on.
Basically an open thread is putting up a soapbox on a blog, so people can talk about any subject that comes to mind. (P.Z. Myers has his untouchable subjects; I don't ... so far.)