The Referees from Super 14 (rugby) are going to front the media after the match to answer questions about their decisions made on the field. Don't know how much it will achieve for Rugby since its pretty obvious if an error has been made and all you gain out of it is a "I'm wrong and I'm sorry".
Cricket on the other hand has a number of grey areas where even technology can't say if it was definitely wrong. Like those faint edges, did they hear a noise or did they see the ball deviate. The UDRS has taken out alot of the errors that would be asked but you could even ask the 3rd umpire why he gave that out/not out something which could have helped for the England v SA series.
While its not going to change the outcome of the game, its good to have the umpires being made accountable for their mistakes, instead of hiding behind closed doors.