Thanks everybody!
hopegclucky, I'm not sure about your situation. My 140 was approved even before I filed for my 485. I'm sure there are lot of very informed people on this forum who can advise or give you facts beter than me.
As far as I know (from my lawyers note), There were 2 memos that came after Oct 2000 when this rule came into existence one in June 2001 and other on Aug 4th 2003. Which says:
"Service memo, which provides that the labor certification or approval of a Form I-140 employment based (EB) immigrant petition shall remain valid when an alien changes jobs if:
(a) A form I-485, Application to Adjust Status, on the basis of the EB immigrant petition has been filed and remained unadjudicated for 180 days or more; and
(b) The new job is in the same or similar occupational classification as the job which the certification or approval was initially made"
It seems this rule came as a memorandum entitled "Continuing validity of Form I-140 petition in accordance with section 106(c) of the American Competitiveness in the 21st century action of 2000 (AC21) (AD03-16)" by BCIS Acting Assocaite Director of Operations Mr.William R. Yates.
hope this helps
-junior