This is the most interesting part to me. I agree with the other people commenting in this thread that advanced algorithm design (as seen in journals) isn't broken. Interesting advanced algorithms do get spun out into open source implementations.

A non-academic community based around discovery, discussion and implementation of algorithms would be an interesting place to hang around. A MVP would be, basically, a discussion forum with an index of github repos for the implementations, but there are other values to be added on top.

Good luck. I'll be paying attention to what becomes of your project.