Just some thoughts....
If you know your new address and are moving immediately after POE, give that at POE (address to which card should be sent to) as Patta has mentioned.
If it is couple of months, relax. Nowadays, you are getting the Plastic card in about 4 weeks on an average !
If you do move after POE, you have to inform INS, but better to keep that address active as far as possible. Other alternative, as Patta has suggested is to use an address you know is relatively permanent.