First up, the soundtrack for the web-series will be downloadble on iTunes beginning September 2, 2008. And the second web-comic is already being written by Zack Whedon. "The soundtrack is rapidly approaching," Whedon said.

The Soundtrack to Dr Horrible's Sing-along Blog is now available on !  It took long enough, byut at last we can have the PHD in Horribleness on our iPods.

And before I rush off to buy it and sing my black heart out, Zack Whedon is working on a webcomic about Moist, the evil Doctor's friend.  I cannot wait to read it.

(via SuperheroFlix)