Here's a great example of free content being delivered in an apparent vacuum: Totally Free Math, a collaborative effort of some 250 teachers interested in producing a freely available textbook for elemenatary algebra students. I say "vacuum" because it doesn't take advantage of wikis, and is protected under a traditional copyright (there's even a link to the US copyright office for those who don't "get it"). Uh...no creative commons here? Yeah. I'm having a hard time getting to the facts of how this came about, but apparently it's the result of a commercial publisher (Bernard J. Klein) deciding to "give something back" to the state education boards they've pillaged over the years. Ah, my heart doth swell at these acts of goodness. I know when I was 15, I had a burning desire for a free algebra textbook. At any rate, I had more need for a free math book than a free condom. Anyway, maybe one the copyright sleuths here can get to the bottom of this.