I think I'm going to add another facet to this. Actually, I already have. It's still primarily books, but since movie adaptions are sometimes awesome (Fight Club, Archangel) and sometimes horrifying (Starship Troopers)...they deserve their own reviews.
So, my self-imposed rules are:
1) I'm only reviewing movies based on books that I have reviewed on this site.
2) As soon as a book that I have read or am planning to read has a trailer, I'll post it so that if you are - like me - a Read The Book Before Seeing the Movie person, you'll have a heads-up.
3) The only tags said posts will get is either "movie" or "trailer" and then in the post I will link to the original book review.
I think that covers it.
Any other requests?