We are very sorry that users are unable to publish to Blogger right now. We have rolled back the maintenance release from last night and as a result, posts and comments from all users made after 7:37 am PDT on May 11, 2011 have been removed. Again, we apologize that this happened and our engineers are working hard to return Blogger to normal and restore your posts and comments. We will post a report once this work is complete.
-The Blogger Team