I called the customer service #, they practically don't give out any information and tell people to wait since it has a 90 day processing period. I personally was told to give them a call if I don't receive anything by 11/28. From what I have been reading on other forums and blogs, people are contacting them and putting a service request are being told to wait 15 days for an answer.
http://www.uscis.gov/portal/site/uscis/menuitem.eb1d4c2a3e5b9ac89243c6a7543f6d1a/?vgnextoid=ddce0b89284a3210VgnVCM100000b92ca60aRCRD&vgnextchannel=ddce0b89284a3210VgnVCM100000b92ca60aRCRD
^ follow the link to contact them and good luck !