The EU PTRs are up, and people are slowly starting to trickle in, with screenshots popping up on MMO-Champion and World of Raids. Unfortunately, very few of us here in the US have managed to be able to bring up the PTR in our test clients, despite Bornakk's earlier words. Hopefully Blizzard will get the bugs worked out soon enough and we'll all be checking out the Magister's Terrace.
The US Character Copy queue is full as well, although there is a handy little page once you get it that will let you see the progression on any characters you've set to copy, so you won't have to keep logging onto the test server and staring forlornly at your empty character select screen, in theory. Other than that, Everything already coming in from the test servers looks like it's going to be a lot of fun to dive in to, and we'll break it all down for you in the next few days, as soon as we can get on ourselves!