I read about it on www.macrumors.com. It's 10am Pacific time, and it'll be streamed live into all the Apple retail stores. They gave the addy for the online stream, but I don't know anything about how to view that, since it wasn't a simple URL. check it out on macrumors.com, they have it all there.
And for us who don't live near an Apple Store, there's http://www.macminute.com/ . I've always followed them when Apple haven't streamed their events on QuickTime - as they say they update on the minute as things happen. I remember I had my pointer on the refresh button as long as the iPod announcement lasted