Watched it at it's US premiere at SXSW.
Awesome documentary!
I didn't see anything controversial that the film board would have any objections to. It's all quite regular/funny, behind the scenes, look at the band on their 2008 World Tour.. the logistical obstacles, the fans, the concerts. Not exactly your stereotypical "rock star sex drugs and rock and roll" type of behaviour (Steve Harris brought his teenage kids along on this tour, and Bruce Dickinson piloted Ed Force One all the way through the tour)
They screened "Metal; A Headbanger's Journey" (Same director Sam Dunn) back at Singapore Film Fest 06 (??).. so you could possibly hope for a screening at this year's film fest or next year.