I have seen a forum where you could add multiple users to a thread. With that option the selected users can edit the startpost with new information. I think this can be a usefull feature for Xenforo. Adding users to threads and resources. In the case of informational resources (I use it for how-to's) it would be handy if I can give another user also access. The change owner option is already there, but would be nice to have a "second" or "third" owner of the same resource with the power to update and change the resource.