I only knew Firefly as That Thing That's Diverting Joss Whedon's Attention From 'Buffy' until about a year and a half ago. Then we bought it on DVD and now I'm kicking myself for a) not watching it when it aired, and b) not getting involved in the effort to save it.
So glad more people will get to see it! Between the convention-busting and the dialogue, it's the best series I've ever seen on TV. And I'm no young 'un.