It's not just the venue that might be moving for the 2011 Tony Awards (Radio City is booked). The New York Times is reporting that the normal end of April cutoff for Tony eligibility might be moved earlier this year. The Times quotes an email from Charlotte St. Martin, executive director of the Broadway League saying that:

The Tony Awards Administration Committee announced today the Nominating Committee for the 2010-2011 Broadway season. The Tony Awards are presented by The Broadway League and the American Theatre Wing.