To monitor my Case Status Online, I visited the USCIS website and register to received my case status updates via email.
Below is my Adjustment of Status Timeline:
August 26, 2008 - Mailed AOS package
Sept. 04, 2008 - NOA date
October 04, 2008 - Original Schedule for Biometrics
October 31, 2008- Change to this date and finally Biometrics DONE
November 18, 2008 - Received email about my case status Approval Notice was mailed by USCIS
November 20, 2008 - Received my Employment Authorization CARD.
Facts about Employment Authorization Card:

Below is my Adjustment of Status Timeline:
August 26, 2008 - Mailed AOS package
Sept. 04, 2008 - NOA date
October 04, 2008 - Original Schedule for Biometrics
October 31, 2008- Change to this date and finally Biometrics DONE
November 18, 2008 - Received email about my case status Approval Notice was mailed by USCIS
November 20, 2008 - Received my Employment Authorization CARD.
Facts about Employment Authorization Card:
You are authorized to work consistent with any conditions shown on the card until it expires.
- If you apply for a job, you may show your card to the employer to show you are authorized to work while the card is valid.
- If you are already employed and this card extends your employment authorization, you may show this new card to your employer to show that your work authorization has been extended.