If you’re a fan of Dr. Horrible’s Sing Along Blog (and if you’re not, you totally should be) then run don’t walk over to this website for Dr. Horrible in 8-bit. It’s an impressive bit of geeky fandom.
Incidentally, there’s been some chatter recently about a sequel – Joss is rumored to be writing it right now. And NPH told MTV recently that the sequel will be a full length feature. Yum!