Admittedly, it’s late, but you have until midnight to see the 3 acts to Dr. Horrible’s Sing-Along Blog.
After midnight, you won’t be able to see it without paying (methinks) iTunes. Funny and wonderful and engaging. Better than some movies (like Wall-e) and not as long. Oh, it’s only on computer (not tv, not movies). Really,… treat yourself and click the image… you won’t be sorry.