My case was filed in NSC on 4/16/2007, transferred to local USCIS office on 8/5/2007, transferred back to NSC on 3/28/2008. After that, there has been one LUD for I140 on 4/20/2008 and no LUD for I485 (last LUD is on 2/27/2008 which is the date of the transfer)