Rush104,
HA! You nerd you! HA!
Serenity was the ship in the TV show Firefly. It was a very short lived series by the guy who created Buffy The Vampire Slayer and Angel. Despite the fact that it only lasted 14 episodes the show had such a fanatical following that the DVD of the TV show sold WAY beyond all expectations. They then made a movie, called Serenity (After the ship) to tie up all the loose ends of the show. It was an amazingly well thought out and fleshed out universe, but way beyond the expectations for FOX television, who put the show out.
One of the more frequesnt posters around here, whose name is excaping me at the moment, has a line from the movie as his signature and a picture of the lead actor as his moniker. I've just settled for Morena Baccarin as my desktop picture.