We're getting tons of reports regarding the Battle.net login server being down yet again tonight, and I can say from personal experience that it absolutely is down. Am I surprised? Not at this point, no. Am I disappointed? Absolutely. This is not a one-time problem, it's occurring with ridiculous regularity, and I really hope it gets fixed soon.
Surely, the Customer Service team will link their support page multiple times throughout the night, but I think we all know by now that what's on that page is not the heart of the problem. It might solve the outliers, but it's becoming very clear that the issue is not on our end here.
We'll update you if anything else happens, but hopefully it will just clear up and it won't come to that.