Jeff, Gamer’s Nook, talks about MIT’s Open Courseware site and says:

Personally I think this is a brilliant idea and provides a first step in an attempt to eliminate world-wide illiteracy. But the despots of the world may think otherwise because an educated populace undermines their power base. I wonder which country will be the first to start blocking MIT’s site.

This, in its first iteration, is a great site. Open Courseware does not appear to provide an interactive class experience but for the life long, self motivated learner it provides more then enough for you work through any of the classes.
It’s unlikely that in its current form it will be subject to much blocking and, for the resourceful learner, similar, but much less organized, material is available on many University web sites.