The Senior Men's event will include the 4th-15th place finishers in Senior men at 2012 US Nationals -- Mahbanoozadeh, Razzano, Carriere, Messing, Aaron, Brown, Dyer, Cassar, Hochstein, Dornbush, Mroz, Alex Johnson -- plus Philip Warren (Jr. bronze medalist), Emmanuel Savary, Sean Rabbitt, Andrew Gonzales, Canadians Jeremy Ten and junior champ Mitchell Gordon, and Chris Caluza (PHI).
Senior Ladies include Mirai Nagasu, Courtney Hicks, Vanessa Lam, and Morgan Bell.
(Like last year, Nagasu did "The Ice" tour in Japan and returned home to compete at Glacier Falls. She's listed for "The Ice" again this year (July 21-29) - thread in GSD: http://www.fsuniverse.net/forum/showthread.php?t=83626 )
Junior Ladies include Mariah Bell, Polina Edmunds, Gwendolyn Prescott (these 3 are in USFS' International Selection Pool), plus the U.S. Novice top 3 medalists -- Karen Chen, Amber Glenn, Amanda Gelb -- along with Selena Zhao, Avery Kurtz, Katia Shpilband.
Junior Men include the following ISP skaters -- Nathan Chen, Lukas Kaugars, Jay Yostanto, Spencer Howe, Shotaro Omori -- plus Vincent Zhou and Jordan Moeller.
The event schedule and full roster aren't available online yet, but I will post when they are.