Twitter is broken at the moment
twitter.com
twitter.com
Don't submit "X is down" to hacker news.
Two reasons. First, if we need the service X, we already know. Second, you will likely be wrong in just a few minutes, as is true in this case.
If you want to know if some web service is down, ask http://www.downforeveryoneorjustme.com/, not HN.