If you missed any of our WWDC 2012 coverage or if you just want to see the keynote for yourself, Apple has posted the announcement up on their events page.
If the keynote isn't showing up for you make sure you're using either Safari or attempting to view it on either your iPhone, iPad, or iPod touch as it doesn't seem to work in other browsers.
You can stream it view the link below.
Update: Apple has now made the WWDC 2012 Keynote available for download in luscious HD form via iTunes.
Str: Apple Events Page