Didn't save /usr properly, meaning I had to restore it from a tarfile. Found out that said tarfile didn't preserve symlinks properly, so several important symlinks are dead, such as /usr/local/bin/mysql, /usr/bin/cc, etc.
E-mail's up. Apache's up for now, at least...had to fight with MySQL a bit to get it working. No guarantees as to which sites will work, although Filespace doesn't seem too unhappy.