Quicktime HD teaser from Yahoo (N.B.: may not be true 23.95fps i.e. 'play jerky'):
480p (44MB) http://playlist.yahoo.com/makeplayli...&sdm=web&pt=rd
720p (111MB) http://playlist.yahoo.com/makeplayli...&sdm=web&pt=rd
1080p (160MB) http://playlist.yahoo.com/makeplayli...&sdm=web&pt=rd

(Vote for/against a one-stop Yahoo trailer list)