Another commentary submitted way back in April, and therefore part of my "catching up" phase here. It should be noted that this commentary also was made available not as a single file but in parts, in this case two. So the podcast-enabled feed does not function properly, since it only picks up the first file. You will have to download the second part by hand.
Nearly five months after the first fan-recorded commentary was submitted (and slightly longer than that since we opened this site), one of our regular contributors (again via Sofa Dogs) offers this commentary on the last remaining episode to be without one. As of this listing, we now have at least one commentary for each and every Firefly episode, Serenity, and the R. Tam Sessions.
The debut of Saffron gets its second fan-recorded commentary treatment, this time from one of our regulars plus a special guest. It also serves as an introduction to the Sofa Dogs podcast.
One of our regular stable of commentators launches themselves headlong into one of the other "untouchable" episodes, that for which your humble webmaster feels Joss recorded one of the best audio commentaries ever. But, someone had to tackle this one eventually. And with this, BDC has commentaries for all but one remaining episode.
At long last, the maintainer of the R. Tam Sessions fansite which tracked these viral videos when they were released back in August (and the maintainer of Big Damn Commentaries itself) has recorded a commentary for those Sessions clips.