Viva Las Vegas facebook page, there are only 500 tickets left. Don't wait to buy 'em kids! Buy them here on the website.
Wish I could go, but alas I am still a Grad student and broke. Next year I will be there rockin' it up, so keep it warm for me.
UPDATE- The 4 day tickets are sold out, but there are a few places that still have them for sale. You can see the list here.