The Stack Exchange family of sites brings a lot of innovation and polish to the question-and-answer genre on the Internet. The sites are attracting true subject-matter experts to a dialog that also brings in a multitude of questions from non-experts, representing both practical ideas and disruptive innovation.
To what extent has the Stack Exchange family spawned new publishable lines of research?
For example, it appears that an answer by Thomas Pornin to my MySQL OLD_PASSWORD cryptanalysis? - IT Security question is the first cryptographic break of a very popular password hashing scheme. (Update: we found a previous publication. But still - very cool)
What other notable answers are out there, that might serve as good publicity for Stack Exchange in academic circles?