I got the Serenity DVD for christmas, and thoroughly enjoyed it last night. I caught a number of the Firefly episodes and think you gentlemens comments are right on the money. If you haven't seen Firefly the movie didn't really go into enough detail as far as the relationships. Especially concerning the characters that died and or the love interests.
I hope they continue with either another movie or more tv episodes. That and I really liked the music played in the background of the tv episodes