Even a bad movie can have a great trailer.
I stumbled upon this fun web site via Mr. Peel's Sardine Liqueur blog's links of interest. Trailers From Hell offers a wonderful revival and nostalgic look back at old movie trailers. With commentary done by real film folk (John Landis, Rod Lurie, Joe Dante, David DeCoteau, Larry Karaszewski, and others), it's a tribute to film of all kinds (well... from the good to camp to Grindhouse variety, that is). And they present new content (a new old trailer) every Monday, Wednesday, and Friday. I think this site has it all,
except an RSS or Atom feed for those of us who use aggregators the site feed is labeled The TFH RSS Feed (under Coming Soon...) [thanks, Tom Edgar]. Anyway, take a look: