I wasn't really asking if it is down. When I submitted the post, I already confirmed that it is down. This is a major problem for the whole internet now that a lot of of websites use Facebook Connect and other APIs. Some businesses run on Facebook. It's a news. Definitely tech related. Definitely interesting for HN aficionados.
No, not really news. Sites fail all the time, cluttering up HN with posts like this are a waste of time.
What is interesting is the postmortem of a failure. Post that when it is available.