Well this is a bit late, but here are my faves so far, etc.
I frequently visit Apple Trailers, so have gotten to see some great trailers before they appeared available in the movies - very good site if you want to plan for movies to see. I was gone for a big chunk of summer without movies, so I did miss a lot of stuff unfortunately.
Movies I've enjoyed immensely:
Transformers
Harry Potter 5
Movies I really want to see:
Bourne Ultimatum
Sunshine
Moliere
Stardust (Not sure how this one's going to be - awesome trailer, but is getting attacked by critics)
The 11th Hour
War (C'mon, Jet Li is great...
)