I would be pretty interested in this as well. I imagine that they only have a loose idea at this point, if at all. If the list of "coming soon languages" is any indication of priority, c and c++ are at the bottom of the pack.
Great questions guys - we use locked-down language sandboxes on our own servers right now (github.com/codewars) for JS and Ruby. Then we're developing a Docker/LXC based server sandbox that will allow us to safely run each code submission in any language in its own container... Another OSS option out there is: http://eval.so/
