From Blackout hits major Web sites | CNET News.com:
"A domain name outage Tuesday morning left many popular Web sites such as Yahoo, Google, Microsoft.com and Apple.com temporarily inaccessible, according to a Web research company.
For just more than two hours--from 5:30 a.m. to 7:45 a.m. PDT--many of the world's most popular sites suffered from widespread outages, according to Keynote Systems, which compiles statistics related to Web surfing. On a typical day, the top 40 sites measured by Keynote rarely dip below 99 percent availability. On Tuesday, however, Keynote saw availability drop to 81 percent. "