Joss Whedon (of Buffy, Angel, Firefly, Serenity, etc. fame), has created a short show (in three parts) that’s available for free viewing on the internet for another day (until midnight, Sunday July 20). After that, I think you’ll still be able to purchase it via iTunes, and there will be a DVD released in the future.
I thought it was pretty entertaining. I loved the Once More, with Feeling musical episode of Buffy. Joss’ songs are always clever and fun.
Also, watch for Dollhouse, next year.
UPDATE: Dr. Horrible is available for free again on Hulu (with limited commercial interruption). Yay!