We have restored all repositories back to normal.  Some subversion repositories were offline for several days during the Amazon storage outage that started last Thursday.  There was a frenzy of activity here and on Twitter.  Thank you for your communication and your patience.  I apologize for the disruption.

Going forward we will immediately make sure that we have replicas of commits in more Amazon EC2 zones and regions.  We are also building the new dedicated servers outside of EC2, which will give us a different storage architecture with a nice performance boost.