First, the PTR is not live yet. And now there's a blue thread stating such over on the European forums. "Current PTR status: Not Live." Supremely helpful in the world of misinformation and confusion that propagates around the intertubes. Update: There is now a US blue thread as well.
The thread does note that "the status of the PTR may change fast and without warning." This basically means that it's in the final stage of getting ready to go live, and that means patch notes.
And on the issue of patch notes, we have heard from numerous blues over the weekend that they have them – but are just not releasing 'em yet. This is too bad, of course, but at least they're ready and will be handed out sooner rather than later.
The PTR forums are active, and you can queue your character to copy over to the PTR now. However the actual character queue is reportedly around 12 days and growing, so it might take some time. Apparently this rather extreme length is because the actual copy process has not begun to run (yet), and so the characters are just getting stacked up to copy over. My guess is that the wait time will shrink rather quickly once things get going.
Should be an exciting week! Stay tuned!
Patch 3.1 brings us Ulduar, dual specs, significant changes to all the classes, and more! We've got you covered from top to bottom with our Guide to Patch 3.1.