If there was any doubt about Oprah's reach: The talk-show diva helped send visits to Twitter up 24 percent in one day. That was on Friday, the day of her well-publicized first tweet. Visits were up 43 percent compared to the Friday before, says Web tracker Hitwise.
Meanwhile, gawkers couldn't help wanting to know more. The search term "oprah twitter" became the 35th most used last week, says Hitwise: "Considering that our search data is weekly and that the show only aired on Friday, this is impressive."