Finally, after more than 2 years of name check, wrote to the first lady, FBI responded in Jan'08 saying NC replied to the USCIS in Nov'07.
Got welcome email today and update in the system.
Have been a silent watcher at the forum. Everybody here is very warm-hearted and helpful. Many thanks!!! And good luck to all the guys and girls who are still waiting. Hope 2008 is the year of ours!