Can you please explain how what you propose differs from Academic Earth? Obviously it has the lectures, and found this link on the page for the first lecture for the Stanford Machine Learning course:

http://see.stanford.edu/materials/aimlcs229/problemset1.pdf

With answers here:

http://see.stanford.edu/materials/aimlcs229/ps1_solution.pdf

I think the readings are available, too. So, we're missing help forums, is that all?

I'm still stunned that all these great lectures are available for free online. All I'm lacking is the time and energy to digest them all.