• Dick Cheney is the original source of the Valerie Plame leak, despite what the veep's chief of staff Lewis Libby told a federal grand jury. Scooter says he got the name from journalists, while some legalese leakers say it was Cheney who informed his wingman. (And then the game of telephone stopped when Sally's mom made the girls turn the lights off.) [E&P]

• We heard over the weekend that Wenner Media was dropping its book division entirely, but now it turns out it's just department chief Bob Wallace who, along with his assistant, is out the door (who, it's no surprise to share, we hear has "long been unhappy" with the gig). The publishing unit will stay on, but only because its ties to Disney's Hyperion Books allow Jann Wenner to maintain control of a media "empire." And just when Wallace actually got a staff! [WWD]

• Don't get the wrong idea: When Viacom splits itself into two major units, chairman Sumner Redstone doesn't plan on exiting, nor (he says) did he ever give that impression. Instead, he'll help fuel ego battles between Tom Freston and Les Moonves. [NYDN]

• Three hours of American Morning just isn't enough, so CNN is cutting Daybreak from the 9-10am slot for a fourth hour of O'Brien Squared chatter. [TVNewser]

• Meredith's purchase of five magazines from Gruner + Jahr might actually have been a wise decision: first quarter profits are up 11 percent. Morale, meanwhile, hovers at Conde Nast levels. [Des Moines Register]

• As expected, David Lee Roth is taking over Howard Stern's West Coast market on Infinity, while Adam Corolla mans the East Coast gig. Stern, fresh off learning his studio would be outfitted with waterproof walls, is already disinterested. [SmartMoney]

• Diane Sawyer is not taking over Peter Jennings' World News Tonight gig, lest you think a major media company would put a woman in such a commanding position. For the record: We said "woman," not Elizabeth Vargas. [Houston Chronicle]

• Does anyone want the top spot at Men's Journal? Zinczenko? Foxman? Essex? Bueller? [WWD]