Immi_Quest,
In all likelihood - you will be called for an interview. I am in the same boat, just waiting. This is based totally on getting a hit from the FBI record check I think. Since you can still get a hit, even if the record is expunged, USCIS will want to call you for an interview. What i am not clear on is if USCIS will call for an interview based on what you answered too. My situation is I am not so sure FBI has a record of my arrest (as it is expunged) though i've answered "yes" to the arrest question, so i am not clear if USCIS bases its decision completely on the record check irrespective of what you've answered to the arrest question on 485 application !
From your end, if you can get an original court disposition document stating that the case is dismissed, copy of statute or law stating that the max offense / punishment is less than 1 year, you are good to prove this is not case of moral turpitude. BTW..Did this happen after you applied for 485 ?
"Pralay" is an expert on this subject!