Today we’re opening up a new site — http://status.github.com. We’ll be using this site (in addition to our twitter account) to post status updates (maintenance warnings, outages, etc). This site is hosted over at Heroku so it will be shielded from any network problems GitHub may suffer.
We take our uptime and availability very seriously (remember, we use GitHub to develop GitHub!) and want to be as open as we can with service disruptions.