FYI, for anyone interested, there's a lot of Firefly action and fan created content. Many are of surprisingly excellent quality. Here's a summary of what I aware of (in addition to the main item in this thread).
An excellent book...
(just a podcast reading of their episodes)
Extended scripts/written episodes for fan created seasons
And a couple of fan created shows seems to still be progressing very slowly...
And, of course, the movie from above...