It’s so old-school, it’s in print form. Bob has been doing a series of informal essays for the Israel Journal of Ecology and Evolution. He’s using as way to get down on paper all the ideas he has that, for whatever reason, aren’t a good fit for a standard scientific paper. So basically, just like a blog. As with everything Bob does, it’s great stuff. You can read the essays on Bob’s website (first one is #202).