Oral argument for the Nevada marriage equality case, Sevcik v Sandoval will be held by a panel at the Ninth circuit on April 9, 2014. You can find out more here.
Oral argument in the Virginia marriage equality case, Bostic v Schaefer, will be held by a panel at the Fourth Circuit during the week of May 12, 2014. More can be found here.
7:25 PM PT: Update 1 -- Equality On Trial is reporting that the oral argument scheduled for April 9, 2014 at the Ninth Circuit has been removed from the appeals court's website calendar. I'm not sure what the problem/issue is. I'll post another update if I find out anything further.