sathya10, thanks for the information.
I created the online account some time again. I guess that what you mean the the "Last Update" date column shown in the table of your applications.
My I-485 was filed in September 11, but the notice date is 10/3/2006. Which one is used to determine the processing time/order. From USCIS processing time page, it looks like the latter.
Moreover, I did the finger print (code3) on November 18 for my I-485. But no LUD after that. is this normal? As the official fugures put 80% name checks are done within 6 weeks. does it mean my name check would be long?