That sound you hear is the great web crash of 2007.
More seriously, TechCrunch says a major SF power outage may be to blame for some pretty major sites going down today. Technorati, Netflix (my quuueeeuuue…), Yelp, Alexa and others have been affected. Valleywag, on the other hand, is blaming a drunk employee at the hosting company.
Don’t panic. All will be well…