Carrie Fisher is the first celebrity guest confirmed. "Princess Leia is going to be there, and she's always a huge, huge hit," says Steve Sansweet, Lucasfilm's head of fan relations.
Interestingly, the article refers fans to the CV website for more information on the announcement, but so far the website has not been updated with details. Additionally, given that Official Pix's Ben Stevens said today that the first guest would be announced tomorrow, it's possible that the USA Today story was published prematurely.
The article, found here, also discusses new toys commemorating the 30th anniversary of The Empire Strikes Back, including the mail-away Boba Fett and the AT-AT.
UPDATE: A story with this announcement hit the official site shortly after I wrote this post.
Rebelscum Breast Cancer Awareness Charity Patch Posted By Philip on November 25, 2014: Thanks to everybody that ordered patches. I sent a check for $1,600.00 to the National Breast Cancer Foundation on Monday. While it's not as much as I hoped for, it's still very much appreciated. They will remain for sale in the store for anybody that still wishes to purchase them. Details after the jump.