I have browsed the discussion forums on Apple.com and haven't found a single person with easy success attaching more than one hard drive to the AEBS. I have one 500GB that works fine, but everything goes screwy even if I just attach it by itself to a powered USB hub attached to the AEBS. Needless to say attaching a second (almost identical) hard drive doesn't work. They're both My Book drives from Western Digital. The solutions I saw involved a whole lotta meddling with stuff I don't need to be meddling with (i.e. system files) or reverting to an old firmware version. Anybody had success attaching multiple drives?