Neil Patrick Harris was gracious enough a couple months ago to tell us about Dr. Horrible’s Sing-Along Blog, the online musical minisode series he’s starring in for Joss Whedon, in which he plays a hapless supervillain opposite Nathan Fillion (natch) as a stalwart hero named Captain Hammer and Felicia Day as the cute gal from the laundromat who Dr. Horrible can’t muster up the nerve to talk to. Now comes a teaser for the project (the official MySpace page is here). Suit up, folks, this one looks like fun.