USFS' event page has published the practice groups for all the Championship (Senior), Junior and Novice competitors, along with the detailed event schedule that includes all official practice ice sessions that are open to the public with the right tickets: http://www.usfigureskating.org/event_details.asp?id=41451
Just click on the links in the Event Information Box titled "2010 U.S. Champs Practice Groups (XLS)" [Excel spreadsheet format] and "2010 U.S. Champs Schedule (PDF)" [latest version is dated 12/8/09]..
Just click on the links in the Event Information Box titled "2010 U.S. Champs Practice Groups (XLS)" [Excel spreadsheet format] and "2010 U.S. Champs Schedule (PDF)" [latest version is dated 12/8/09]..