Here is a bit more on how it happened ... pretty lame.
“Ramenporn also stated that it wasn’t an attack, but a mistaken configuration change made via a web interface. What really stinks — and why Facebook is still down hours later — is that since both BGP and DNS are down, the “connection to the outside world is down, remote access to those tools don’t exist anymore, so the emergency procedure is to gain physical access to the peering routers and do all the configuration locally.”
And lame tho it is, Bloomberg is reporting Zuck lost $7B today in net worth. Can it be down for a few more days? I want to hear Zuckerburg ask somebody if they want fries with that order.