I've really enjoyed reading every issue of Astonishing X-men (most area available in graphic novel form), written by Joss Whedon. I'm sad to say that the final issue will hit the newstands within a few weeks, and then Joss is moving on to something new.
I was poking around the web to find out what Whedon is doing, and discovered that he is releasing a new limited series just for Firefly fans: Serenity: Better Days. Published by Dark Horse Comics, the three issues follow our favorite ship and crew in the days when they were all still together.
Read about Serenity: Better Days #1 here, and pre-order all three at TFAW.