Joss Whendon (Buffy & Serenity) is currently developing a musical web-series called “Doctor Horrible’s Sing-Along Blog”. More details have emerged over that last week, and the fan site DoctorHorrible.net has this description:

During the WGA strike Joss Whedon started writing a three part musical series for the internet. Each of the three episodes will be approximately ten minutes each.

Co-writers for the internet feature are Joss’ brothers Zack and Jed and Jed’s Fiancé Maurissa Tancharoen . The writing and shooting have been completed and the series is now in post-production.

“It’s the story of a low-rent super-villain, the hero who keeps beating him up, and the cute girl from the laundromat he’s too shy to talk to.” says Whedon.

“Doctor Horrible’s Sing-Along Blog” will star Neil Patrick Harris as Dr. Horrible, Nathan Fillion as Captain Hammer, Felicia Day as Penny and a cast of dozens.”

This is exciting in so many ways. First, Neil Patrick Harris in a musical! Nathan Fillion working with Joss again! Also, when someone as respected in Hollywood as Joss Whedon starts making content specifically for the web, it goes far in legitimizing the medium. Hopefully this is just the start of quality (but network unfriendly) shows coming to the internet.