I'm working on a site that uses Facebook Connect so user's can log in with their FB accounts. I just saw this and it gave me pause. It seems FC is down and the login says to check back in hours. Hours? Really? Ouch. So this means my site would be down for hours just because the folks at Facebook feel like doing some maintenance? This is bad, very bad.
If you're going to provide a service like Facebook Connect. It better be up all the time. I may need to rethink the whole Facebook Connect usage if this is going to be an ongoing problem.