del.icio.us reported a weekend power failure took down their data center and wiped out their data. Del.icio.us provides a useful, versatile service used by Freshblog and many thousands of other blogs and websites.
This outage isn't critical to Freshblog. You can't see categories or tag clouds right now, but in the short term that isn't a huge loss. Are there any websites or blogs for which del.icio.us is mission critical? Has this single point of failure completely crippled the function of any website out there?