Official Blizzard Quote:
We're awestruck to announce that Tenacious D, the greatest band in the history of the world, will take the stage at BlizzCon 2010 to close out two days of epic entertainment!
Although tickets to the convention are sold out, you can still catch all of the panels and events, including Tenacious D's performance, with BlizzCon Virtual Ticket. ( http://blizzcon.rayv.com/ ) online or via DIRECTV in the United States. The Virtual Ticket multi-channel Internet stream allows viewers to switch between multiple channels of live HD coverage dedicated to different areas of the show.
Check out the press release ( http://us.blizzard.com/en-us/company/press/pressreleases.html?101011 )to learn more about this soon-to-be legendary rock spectacle!
In addition, the 48-hour pre-BlizzCon sale is supposed to be starting today granted there are no more issues.