Here are a couple of excerpts from Variety regarding Sweeney Todd.
"While remaining faithful to the stage production, Burton has put his distinct imprint on the musical thriller, with plenty to lure awards voters, including the tight screenplay, surprising performances and, of course, the technicals."
"While Burton's unique vision has yet to result in any pic or director Oscar nominations, "Sweeney Todd" could change that. The film is unlike anything Hollywood has ever seen -- gruesome but smart, melodramatic but witty, quirky but emotional -- and kudos voters may well respond."
"John Logan's screenplay smartly condenses the legit version to under two hours. Several performances, including those of Helena Bonham Carter, Alan Rickman and Timothy Spall, will merit attention -- though anchoring the film is Johnny Depp who offers another reminder that he can apparently do anything"
HERE is the link to the rest of the article. I expect the buzz for this film to only get bigger and bigger with each new batch of press screenings.