So i will be getting a 13inch MBP soon and i already have a Airport extreme base station and i was going to get a USB hard drive to plug into the AEBS and use to back up my new mac with time machine but i'm not sure if it's possible. Googling around i found a new story saying apple had updated the AEBS firmware to allow time machine back up but i check in my airport utility and didn't see the option. So has anybody done this before?