If you hear about a movie currently in theatres which you would like to see, but you'd rather wait for the DVD, you can still add it to your Netflix queue.
Browse Yahoo! Movies, where you can find reviews and ratings of current theatrical releases. Each movie's home page has a "Netflix-save to rent" button.
Browse Laqat Movies, for news and reviews on upcoming and current releases. Click "rent" link under "coming soon" to add a movie to your Netflix queue.
Browse Cin-o-matic.com for movie ratings, create a "Watch list" of theatrical movies, and they will alert you by email when movies on your watch list are in theatres near you, or available on DVD. Movies on DVD have an "add to queue" button.