Just got e-mail from USCIS. Our I-485 have been approved.
Here is the detail.
EB2 at NSC.
I-140/I-485 ND: Sep 2,2003
I-140 AD: Feb 28, 2004
FP: May 14, 2004
I-485 REF: Feb 28, 2005
REF received on Mar 14, 2005
I-485 AD: Mar 24, 2005
Still waiting for the approve notice.