EDIT: As of 22 May, 2012, it's still down. The source of the problem has been traced to a database corruption, which is in the process of being restored and backed up.
EDIT: As of 25 May, 2012, the new domain site is up and running again. The problem was established as a corrupted database. The backup post file was also corrupted, which means literally starting afresh using the backed-up posts and materials.
EDIT: The new domain can be found here.