I recently posted a discussion post on a similar topic, albeit for archival reasons, rather than regular community support. Either way, I'd encourage you try it out. There seems to be a cautious attitude on LessWrong that if one asks about starting a regular or periodic type of thread, a consensus will come forth giving great reasons either for or against the thread's institution. This doesn't really seem to happen. If you start this thread, include for the first one a note like 'If this is used lots, or well-received, then we can make it a monthly thread". If it gets lots of comments, or gets lots of upvotes, or even gets a few upvotes with a decent upvote:downvote ratio, I figure that's grounds for posting the thread a second time. The group rationality diary encourages people to report mistakes and failure modes, but trying a thread explicitly and only about reporting failures and mistakes might work.