Received a Facebook message notification this morning through email. Now, this was actually an important message that I needed to respond to in a timely fashion, from someone I became Facebook "friends" with, but did not have his direct contact info (nor he mine, which is why he used Facebook to communicate). When I tried to respond, received the message below (yes, tried a few times)...obviously Facebook is not ready to be a "mission critical" application. No company is too big to fall. Unless Facebook grows up and becomes a truly always-on app, achieving a 99.999% service level, they will fall.