Return of the King Extended Edition info:

Release date: December 14
Pre-ordering starts: October 1 (This Friday)
Movie length: 4 hours, 10 minutes
More information here

Update 09-28: The Fellowship of the Ring Extended Edition is 208 minutes. The Two Towers Extended Edition is 208 231 minutes. The Return of the King Extended Edition is 250 minutes. 208 + 208 + 250 = 666 minutes. Update update: IMDB and Amazon disagree about Two Towers' runtime. I'd be likely to agree with IMDB, though, so that means the symbolism is broken. Oh well!