I installed a beta version of xenForo - Beta 8 on October 27th - and then upgraded to the latest Release Candidates as they were released. But I have been testing xenForo 2 long before that, though. Both on their site, and on my own server. xenForo 2 has officially gone gold today. So, as of now, DMCForums is on the latest, stable version of 2.0.0!