485 status

[niagarafalls]

hi,

Received email today: 485 approved
status: Post Decision Activity
Category: EB2
PD : Aug 11 2006
I-485 - July 2007 concurrent filing
FP : Oct 2007
center: NSC

question:
how long does it take for the status to be updated to CPO. what is the approx wait period to receive the actual perm residence card ???
please reply.