A lot of people hate this question... so I'll try to reword it.
Has Stack Overflow considered moving into an educational capacity that leads to something tangible like a certification?
The certification would be one that SE markets (perhaps at conferences) to businesses that helps to indicate developer competence.
For instance, you could have a C++ course and certificate, which would essentially show that others appreciate your insight in C++. One of the requirements for certification could be in contributing answers to C++ section of SO. SE could partner with a company like Pearson VUE to reaffirm someone's skill via a subject matter test. I see certifications such as CISSP, CCNA, etc in the "nice to have" section of job listings. Why can't SE have a cert?