idesi
Firstly Congratulations !
Can you pls post your interview experience and time line, also from which state did you apply N-400 ?
As for Address change, my 2-cents,
1. Inform Local Post office for address change
2. Write to INS ( providing them with file number etc ) of your address change
3. Call INS local number and update your address
4. If at the old residence you know someone have them keep your mail for you in case your oath letter arrives there.
Hope this helps,
SanjayH