We have books.
Signed by Wil Wheaton:
Excellent essays on various aspects of Firefly and Serenity, edited by Jane Espenson:
A collection of posts and thoughts on watching Firefly for the first time by @MarkDoesStuff. At the moment he is watching & posting about Season 5 of Buffy and Season 2 of Angel, concurrently. Yesterday's post was on "The Body".
Trade Paperback collection of Dollhouse: Epitaph comics.