The PTRs are offline and we should be receiving patch 2.2.2 on the live realms early Tuesday morning. For those of you that do not remember, patch 2.2.2 is the small patch in between the 2.2 Voice chat patch and the 2.3 Zul'Aman patch that brings Blizzard's new October event called Brewfest. Also included in patch 2.2.2 are updates to the Hallows End event, so don't expect everything to be the exact same as last year!
Read more on Brewfest here. Expect patch 2.3 to hit the PTRs sometime later this week.
http://www.worldofwarcraft.com/info/events/brewfest/