contrary to what most people assumed, there were not too many 485 filings during Sept-Oct 2005 retrogression frenzy. Not even doubled(10-30% increase compared to other months depends USCIS center). Correct me if I am wrong. you can see the number from
http://www.immigrationwatch.com/router.jsp?action=list_stat&table_name=IMMI_PS_LINI485&year=2005
So the advancement of visa buletin may pass sept/oct 2005 soon!