Too funny -- I diagnosed this to L3 on my home net this morning and I found myself saying "I wonder if anyone else has this issue?". When it comes to the backbone providers there is no Twitter account or status.level3.net or status.theinternet. Hard to do when everything is decentralized. I usually go hit NANOG when stuff like this happens but you're not guaranteed to find something real time there.
It's funny, because when you think about it, the Internet is remarkably centralized despite its potential to be almost completely decentralized.
A coworker of mine was telling me just this week that the building we work in, in New York City, is one of two single points of failure for the Northeast (and both points of failure are in New York).
This is an incredibly chilling thought when you consider just how little control humans still have over natural disasters (we saw this firsthand last year in NYC).
By "single point of failure" I don't mean that every single person would be unable to access every single website, but that large chunks of the Internet (particularly anything coming from Europe) would be unavailable for most of those users.