I found that Stackoverflow has just launched a new beta called Documentation, the concept of which is to build documentations for programming languages, etc. with the efforts of the community.
I'm wondering if it is possible and whether it is worthwhile to do similar things with the Japanese language. The motivation that I have in mind is to build a structure upon which the knowledge & insights shared in sporadic Q&As can grow and be organized in a more systematic manner. And indeed, one of the pros of such a structure, compared to existing textbooks & grammar books, is that it can continuously incorporate fresh materials from Q&As.
If many of us find it worthwhile & workable, we might advise StackExchange to customize the Documentation Beta for its natural language related sub-sites.