Joss Whedon's latest brain-child, a 40-minute long online musical about an out-of-work supervillain titled Dr. Horrible's Sing-Along Blog, is almost ready to air on the web. Whedon spoke to SCI FI Wire about the project which stars Neil Patrick Harris, Nathan Fillion and Felicia Day.

"It's about a low-rent supervillain [Harris as Dr. Horrible] who's trying to get into the Evil League of Evil and defeat his nemesis, Captain Hammer [Fillion] and work up the nerve to talk to the pretty girl at the laundromat [Day]," Whedon said. The idea occurred to Whedon a while back, and it was co-written by Whedon and his brothers, and brother's fianc&#233e. They put the project together during the WGA strike, and were amazed at the talent they found to work on the show.

"We got this amazing crew," Whedon added. "Everybody just sort of said, 'We'll just jump on,' and in six days we shot this 36-minute, three-part oddity, which I think is the most fun I've had in about seven years."

Whedon's next step is to find a venue to air Dr. Horrible so that it can earn its money back, and the crew can be paid. Whedon anticipates that Dr. Horrible's Sing-Along Blog will first appear on the web, followed by releases on iTunes and DVD.