Just in case you've somehow managed to be on the internet and not have heard about it, I must direct you to Dr. Horrible's Singalong Blog. There are not words for how awesome and amazing and funny it is, and you only have until tomorrow to see it free online. You can also buy all three episodes from iTunes, and the DVD will be available later, with all kinds of ooey gooey good extras.
Know that it's Joss Whedon and Neil Patrick Harris and Nathan Filion and singing and supervillians.
Aw - my first commercial blog entry. Sniff. It's a very geeky moment for me.