The scene is a packed high-school assembly. A girl band called "The Christian Jewels" has just emoted (sung is the wrong word) in front of an audience waving outstretched arms. Suddenly, Pastor Skip (Martin Donovan), principal of the school, runs onto the stage, executing a 360-degree flip. Throwing an arm towards the crowd, he shouts, "Are you down with G-O-D?" It's one of several on-target moments in Saved! (rated PG-13), a teen comedy that often viciously mocks fundamentalist/evangelical Christians. The movie is at its best when lampooning painfully forced attempts to repackage the gospel for the MTV generation and is...