Need I say more?

http://www.blizzard.com/diablo3/index.xml

http://www.blizzard.com/us/splash.html is so cool right now and the next screen also.

Finally...

The gameplay footage is a must see!

http://www.joystiq.com/2008/06/28/watch-diablo-3-teaser-and-gameplay-footage/

I think I just had a geek-gasm.

HAWT.

Geekgasm here too.

This looks really cool! I can't wait, I want it now!!!

But alas, knowing Blizz this probably has a November 2009 release date...
*sigh*

Considering they weren't going to actually announce it for a month or so, yeah.

Only reason it was announced so early is because it was slipped onto some teleprompter by accident and the new Diablo III forum was inadvertently activated during a battle.net forum update.