At last, Joss Whedon's web-based musical is coming to DVD. Dr. Horrible's Sing-Along Blog ($10) stars Uncrate fanboy Neil Patrick Harris as Billy, otherwise known as Dr. Horrible, as he attempts to be accepted into the Evil League of Evil and woo his laundromat crush Penny, played by The Guild's Felicia Day. All that stands in his way is Captain Hammer, his superhero nemesis played by Nathan Fillon. With witty special features like Commentary! The Musical, it's a must-own for any fan of the "blog."