I’m a technology director at a school, and I’ve been encouraging my wife (who teaches science at another school) to use WordPress for a classroom blog. I even set it up for her, and I’m going to teach her students to use it. I don’t recall there being a user limit when I set it up (I may have missed it).
If there is such a limit, is there any sort of NFP or education discount for the “unlimited users” upgrade (say, maybe, free?) There ought to be.