Seem like a good way to mix technical blog post with SF.
Some questions can easily be good subject for good documentation.
For SF my concern is that a good documentation usually die in term of age due to lack of article update (to follow new version and such). A practical example is older KB from citrix are now no longer on the Internet. Canonical's answer and question I seen on SF are really generic, thus the one I seen can survive in term of time.
Another aspect is when a lot of documentation will be done, how will we deal with copied content ? I ask as Iam giving some time to a wiki platform, and yes moderation for that is a reality, as copying a good article is a easy way to cheat the point system. Are we ready to add some burden on that level ?