A fresh popup from the in-game breaking news section tells us that the extended maintenance has been extended until 12:30 p.m. PDT. They are hard at work getting patch 2.4 ready.
If Blizzard is actually able to pull this patch off with these short down times, I believe it'll be the first one that they've not had to extend maintenance by hours and hours and hours. I for one am hopeful that they'll be able to do this, and am looking forward to some afternoon romping around Sunwell Isle.
Our coverage, and your comments and tips, have been non-stop today! Keep checking back with us throughout the day and the evening for the latest. We'll be sure to post and let you know when the servers are up – whenever that may be.