Filled my I-140 in Dec 2000
My I-140 was filled in Dec 2000 and there was no response until this month. Finally, as on 19th Feb, 2002 AVM says that INS need some additional documents.
I was in the same situation as of you. I called my attorney but nothing happened. I talked to my employer and then my company hired another Attorney and she contacted INS through AILA last month. And then INS assigned my file to some officer.
According to me contact your employer and/or attorney. they are the only one who can find the status for your file.
Good luck.