It's great they release all of this for free. I mean, it will never be the same as having that piece of paper from MIT— but at least one can rely on the resources as being quality.
I'm glad to see you write this. When MIT launched OCW (thanks to Hal Abelson, of SCIP fame) I was shocked by the number of articles amazed that MIT would give away their "Crown Jewels". MIT's position was precisely yours.