Good news on AC-21 (Portability)..
http://www.murthy.com/UDportme.html
The Memo provides that the approved I-140 petition remains valid even if the original sponsoring employer requests its revocation, as long as the I-485 application has been pending at least 180 days at the time of the revocation or withdrawal. Those who chose concurrent filing enjoy an advantage, as they are accruing time toward the 180 days while the I-140 is pending, as long as it is finally approved.
http://www.murthy.com/UDportme.html
The Memo provides that the approved I-140 petition remains valid even if the original sponsoring employer requests its revocation, as long as the I-485 application has been pending at least 180 days at the time of the revocation or withdrawal. Those who chose concurrent filing enjoy an advantage, as they are accruing time toward the 180 days while the I-140 is pending, as long as it is finally approved.