The official trailer for Serenity came out about an hour ago and man, does it look good. The effects look sharp and the dialogue is typically Whedon-y. I feel pretty confident in saying that anyone who dug Firefly, the TV series from which the movie spawns, is probably going to like this movie. It honestly looks like the TV show on steroids, which is exactly what I was hoping for.
More dicussion of Firefly and Serenity later, but for now, go watch the trailer.