Member of the KA team here. We're in the final stages of getting this new exercise framework live. If you're interested in contributing towards the new framework or helping our beta testing efforts, please check out https://github.com/Khan/khan-exercises/wiki/Getting-Involved (if you're interested in helping out our beta, look for the hipchat room on the wiki page).
The new framework looks great! It's amazing to see how much KA has accelerated since the funding and the progress that's being made. I'll take a look to see if I can help out
So I tried to download the source code for the entire project from https://khanacademy.kilnhg.com/Repo/Website/Group/stable But every time I did that I got a connection error after downloading about half of the chunks. Is it possible to source this repo in Github, Google code or somewhere else where this disconnect problem is not an issue?