It seems to me that the ability to merge threads (either automatically or through moderator action) would benefit this, and the problem of multiple posts on the same subject in general.

Although I don't agree with seeing popular, user generated content as a negative, but it's not my sandbox. I think it's at least better than yet another Techcrunch post or ceaseless bickering about class warfare and internecine SV politics.

Also, perhaps these threads should automatically expire weekly.