They come shambling forward, arms outstretched, eyes a putrescent, unseeing white, spitting regurgitated parts at our feet. They are the young filmmakers who would be zombie mavens, and their numbers are legion. In ''Undead," sadly, rigor mortis has set in.
God knows the Spierig brothers, Michael and Peter, have precedent on their side. Sam Raimi and Peter Jackson are just two of the many directors who have leapt from low-budget gore-a-go-go beginnings (the ''Evil Dead" trilogy and ''Dead Alive," respectively) to Hollywood fame and fortune -- and, like the Spierigs, Jackson's from Down Under. (All right, they're Australian and he's from New Zealand, but their collective bathwater still drains clockwise.) ''28 Days Later" and ''Shaun of the Dead" have primed audiences for a new strain of zombie with accents and (severed) tongues in cheek. And here's George Romero, the man who first essayed the notion of spleen-munching corpses kicking down your front door, with the new ''Land of the Dead."