Edit: And it's back up!
Original story: I was sitting down at dinner chatting to a few friends over Facebook Messenger a few minutes ago, and noticed that my messages weren't going through. I thought it was just me. I drove home, rebooted my phone and the same thing happened.
Facebook is down. Right now, visiting the mobile site or the desktop site, shows that "Sorry, something went wrong. We're working on getting this fixed as soon as we can". There's no ETA right now, but Facebook is down. Hopefully we'll have a reason for this soon, as it's a pretty damn big site and service to all of the sudden go dark.