I think @Mike is doing an excellent job however we should do our best to properly test our findings about possible bugs before reporting them and check if these are not duplicate as a way to help him to relax... if we keep reporting without self-control then we're going to make him get very stressed and that isn't going to be good for him, for us nor for the forum world because XenForo is without any doubts the best forum software ever created.
I can see that the future of XenForo is very bright. In fact, I think that XenForo is going to revitalize many forums that are suffering from lost of activity from their members due to the lack of interactivity that their current forum software has (other than XenForo). Also, XenForo makes forum administrators to recover their own lost of interest in their communities.
For all of this, I think that XenForo is way more than a forum software, it's an internet revolution. It's the evolution of forums!
Keep it up @Mike and hope @Kier could join back to the development soon, if 1.2 is that good with only one developer working on it I can't imagine what 1.3 is going to be if instead of one there are two genius working on it