Joss Whedon writes about Dr. Horrible's Sing-Along:
ONE WEEK ONLY! AN INTERNET MINISERIES EVENT!
"Dr. Horrible’s Sing-Along Blog" will be streamed, LIVE (that part’s not true), FREE (sadly, that part is) right on Drhorrible.com, in mid-July. Specifically:
ACT ONE (Wheee!) will go up Tuesday July 15th.
ACT TWO (OMG!) will go up Thursday July 17th.
ACT THREE (Denouement!) will go up Saturday July 19th.
Read it all! And sing along!