history:
7/2/2007, I-485 submitted
7/10/2009, refrence letter for I-94 information
6/10/2011, made service request
6/13/2011, called congressmand for status
6/14/2001, respond from congressman office: document with officer for final decision
6/15/2011, approval (date on green card)
6/18/2011, Got green card for whole family
total 3 finger print, no any update for on-line status since 2009
Good luck to everyone!