Facebook's Reliability Issues

Facebook Error Screenshot

This morning I tried accessing my Facebook profile and it didn’t seem to load. I received the screen that you see above. Recently, I have been receiving an increasing number of emails from my readers who are having problems with logging in to Facebook. Many of these issues came from people in the United Kingdom but today I can’t access my profile. Everything else seems to be working fine. It looks like Facebook is having some serious growing pains. I remember MySpace having serious outages when they began experiencing exponential growth. Looks like Facebook may just be experiencing the same thing. What sort of reliability do you think is acceptable for social networks? Should they be up all the time?