unfortunately some process (probably the backup) went crazy and used up all the hard disk space. I have gotten it running for now, but until Erik gets in there with his #4 Ratchet Wrench and a large hammer it may play up a bit. So expect the site to be a bit slow today.
The problems should have been solved by now (took me a few hours late last night). But please let me know if you're still experiencing any issues...