Insiders have gotten to see Dr. Horrible’s Sing-Along Blog early and the reports are flying in.

And a “Dollhouse” musical? “I rule out nothing,” Whedon joked.

For the outsiders, it premieres online in three parts next week starting July 15th. But after the third one debuts, you’ll only have 48 hours to check it out before it’s all pulled.

From Joss Whedon to Matt Roush on tvguide.com:

“Well, Eliza (Dushku) has a lovely voice. But first I have to make a normal Dollhouse, which is hard enough.”

Plus more goodies in the article about Dr. Horrible’s Sing-Along Blog starring the legendary Barney Stinson.