On February 13, 2009, the Ninth Circuit granted a request for en banc review of Dukes v. Wal-Mart Stores (9th Cir. 2007) 509 F.3d 1168. On March 11, 2009, the Court issued a Corrected Notice of hearing, listing March 24, 2009, at 2:00 p.m., as the date and time for that en banc hearing in the San Francisco Courthouse of the Ninth Circuit. I don't know what a "normal" lag time is from granting en banc review to setting the hearing, but in appellate court years, that seems like nanoseconds to me. The UCL Practitioner has some detailed coverage of Dukes in this post collection.