Dr. Horrible's Sing-Along Blog directed by Joss Whedon of Firefly was my first experience with Hulu and quite enjoyable. Dr. Horrible's made me laugh and think that the internet is allowing us to find entertainment that can appeal to smaller (maybe larger) groups that would enjoy this type of fair.
Summary: Aspiring super-villain Dr. Horrible (Neil Patrick Harris a.k.a. Doogie Howser and How I Met Your Mother) wants to join the Evil League of Evil and win the girl of his dreams, but his nemesis, Captain Hammer (Nathan Fillion a.k.a. Firefly ), stops him at every turn in this three-part musical.
Wikipedia article on show.
Laugh out loud and enjoy the tunes.
