Twitter introduces “Promoted Tweets,” its new advertising program. [NYT]

Who’s bringing whom to the White House Correspondents Dinner? [WWD]

Jack Shafer thinks Oprah’s biographer is a whiner. [Slate]

Bill O’Reilly’s ineffectual ambush of Al Gore. [NYMag]

The web elements that enhanced yesterday’s Pulitzer-winning pieces. [10,000 Words]

“A Real Person Reviews the iPad.” [TBI]

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