A tipster tells us Yahoo will hold an all hands today at 2 p.m. Pacific time Wednesday at 9:30 a.m.. The company is expected to announce layoffs of around 1,500 to 2,500 employees. Sources have told us that Yahoo HR boss Libby Sartain will be among those cut. So will some featured bloggers and the entire Brand Universe team, formerly under Vince Broady. But that won't begin to cover the numbers being discussed. Who else is on the block? Let us know. The official all-hands announcement, after the jump.

The Q4 All Hands will be held in the Sunnyvale cafeteria on January 30th at 9:30 AM PT and will be available live on Backyard (http://backyard.yahoo.com/) for Yahoos worldwide. The webcast will also be archived and available on Backyard the following day. For information security purposes, the All Hands webcast is available only via Backyard.

(Backyard is Yahoo's internal employee website.)