So how long has this been around and I am JUST NOW watching it.
Dr Horrible's sing Along blog was created by Joss Whedon and is a short movie musical made exclusively for the internet. This was written and directed during the WGA strike. It originally was set out in 3 acts, each about 14 minutes long.(this is all 3 in one lump sum. You can find the 3 different acts on hulu.)
It stars Neil Patrick Harris as Dr Evil. he has a video blog and is trying to get into the evil league of evil. He has a PhD in Horribleness and is in love with Penny from the Laundromat.
His arch nemesis is Captain Hammer, played by Nathan Fillion. Captain hammer is a self centered, self absorbed super hero.
The music is so good. The screenplay is delightful yet sweet and beautiful and sad all at the same time. The acting is GREAT and I just really love it. I could watch it again and again.