Quoting YouTube live Event on Facebook

Join your fellow YouTube fans on November 22nd for a live streaming event that is part concert, part variety show and part party! Celebrate online (or in person if you are in SF…see below for details) with YouTube live performances, celebrity guests, original videos, surprise collaborations and much more. This event will be a celebration of all things YouTube.
Expect to see Internet-born stars like Soulja Boy Tell‘em, Esmee Denters (viewed more than 100 million times on YouTube), and "Canon Rock" virtuoso Funtwo dazzling the crowd, along with mainstream acts like Akon who has the #12 Most Viewed YouTube Video of all time. There will also be a global b-boy showcase featuring dancers from the movie Planet B-boy; Discovery Channel’s MythBusters will add their signature style of explosive experimentation; that humble little instrument, the ukulele (itself a giant YouTube trend), taking center stage; and perhaps a free hug or two. The Black Eyed Peas’ Will.i.am, three-time Grammy Award winner and Emmy winner for his groundbreaking video "Yes We Can," will unveil a brand new awareness raising video consisting entirely of user generated videos.
In addition, the "Vlog Squad," a group of long-time YouTube community members, will offer exclusive, behind-the-scenes access from different areas of the venue; William Sledd, Michael Buckley (What the Buck), Lisa Nova, and Tay Zonday have already been named as part of this ace reporting team. Tay Zonday will also put his unique pipes to work as the announcer for the show and Mike Relm will serve as house video jockey.
More updates on acts and happenings will be posted at the YouTube Live channel: http://www.youtube.com/live . Subscribe to and visit the channel to get updates.
In the Bay Area? If you will be in the Bay Area on November 22nd, sign up for your chance to get invited to the live event at Fort Mason in San Francisco. Tickets are free, but limited. Sign up at: http://services.google.com/events/yt_live2008
Please note that if you cannot make it to the SF event at Fort Mason, YouTube Live will be streamed live online at http://www.youtube.com/live on November 22nd 5 pm PT / 8 pm ET
Be sure to also RSVP for the live streaming event here.