The Ticker: O’Reilly, Sizemore, Ling…

> The Radio Equalizer tries to understand Jay Severin‘s sudden departure from The Situation…

> Bill O’Reilly on Monday’s Factor: “The Rove story is a media-driven partisan display…99% of all the reporting on Rove is politically-driven. The pro-Bush people are sticking up for him, the anti-Bush people are condemning him. It’s just boring!”

> MSNBC.com has named Jennifer Sizemore the deputy editor for news. She was the deputy managing editor of the Houston Chronicle. Lost Remote has the press release…

> Publicity for Current is ramping up: “At its core, Current TV will be a place where 18- to 34-year-olds can tune in to see what’s going on in their world,” Laura Ling says…

> News Corp. acquires MySpace: It will give the company “a new young audience for clips from its Fox news, sports and entertainment programs,” the LAT notes…