omg! - LOS ANGELES, Feb 9 (TheWrap.com) - There's a whole lot of box-office promise in "The Vow." Sony's PG-13-rated romantic drama starring Channing Tatum as the best husband in the world -- a guy whose wife emerges from a coma with no memory of their life together -- and Rachel McAdams as the wife he woos once again, is on track to gross more than $30 million. While most box-office watchers believe "The Vow" will easily open at No. ...