The original Spider-man teaser trailer was recently release in HD. It featured NYC's World Trade Center, and a HQ version has been impossible to find in a post-911 world. It is a great trailer that gives nothing away about the movie.
Here's the Spider-Man trailer and a few others that build-up the hype without spoiling the film:
Terminator 2:
Die Hard 2:
Now, I'm on the lookout for other cool trailers like these. Any help?