So here's the post for our first ever liveblog!
We'll be watching Dr. Horrible's Sing-Along Blog on Saturday, February 11th at 11:00am PST. Please check a handy dandy world clock or time zone converter to find out when this is for you. At exactly that time, start your DVD, download, etc at the "MUTANT ENEMY PRODUCTIONS PRESENTS" screen.
The rest is simple - laugh, post gifs, and of course sing along.