Oh, it's very obscure -- in the sense that you'll never, but never, see it cited by anything or anybody in the cultural mainstream. Every so often something a little further in from the uttermost fringes (for example, the Naked Capitalism aggregator blog) will include a link, but that's about it. I'm quite sure that if somebody on Politico or CNN or what have you were to start typing a reference to my blog, they'd spontaneously combust on the spot. ;-)
Re: Population Immunity