I've noticed that some of my colleagues and friends at KU have wikipedia pages about them. Some of them are less distinguished than I am, or about the same; some, of course, are much more so. In short, it is fairly typical of someone to have an article on wikipedia as an academic, sometimes as just an Associate Professor with a single book at a Great Plains University. It's still a minority, but I am going to keep watching this.
I don't have one about me, and I'm certainly not going to write one about myself, though I imagine someone with a vested interest has to have taken the effort to write articles about relatively obscure academics like some of my colleagues. (There is only one from my own dept. and it is not necessarily who you would expect.) It seems clear that the "notability" criterion has become quite relaxed of late.