Hanz,
There is a thread which contains tons of details regarding the FBI name check:
http://www.immigrationportal.com/showthread.php t=136848&page=15&pp=15&highlight=FBI+Check
Basically, FBI sent name check results to the USCIS head quarter, all different service center will be able to see the results once they are uploaded to the head quarter's main frame, it takes about 10 days.
BTW, I sent my inquiry email in last Nov, Dec as well as 2 weeks ago, yesterday FBI replied which referred to the my last email.
caiyw001