Finally there is good news on my case.
On 25th Jan, 2012 I received "Card production" mail from USCIS.
On 26th Jan, 2012 I received "Decision" mail from USCIS.
Today 27th Jan, 2012 - Cards mailed to the address mail from USCIS.
Till now I have not received the cards in mail but mine is approved.
Finally Greened after 12 years.