Yes, they have had a few issues this week. I believe they are doing some hardware migration.
Could be worse right? Back in SVN and CVS days, you only had a partial copy of the repository. At least you can do some commits/merges/branches offline.
But in reality, it's a pain, especially when you need changes from another developer. So what do I do when my git host is down? I come on Hacker News to see what other people are saying about it.