This is important, this is more than important actually...it's something much more. This is Amazing. If you haven't heard about Dr. Horrible's Sing Along Blog, it's something you really need to look into.

It's smart, it's funny, it's a musical, and most importantly of all, it has NPH himself. When you are at the site, make sure you check out the master plan, it's a letter from Joss Whedon explaining how Dr. Horrible came into existance, and what you can do to help.

Also, make sure you catch this before Midnight on Sunday July 20th, because then it goes away and you won't be able to see it for free.