I just received this personal space reward upon arriving at the Hub. Appears you don't need to head to the Action District to get it.
Edit: Seems you still need to go to the Action District to get furniture items. There are 20 items including the space.
Its in the XMB....you can also go to Cutteridge to get the space and owners of the minibots battlebox game and the minibots cake or companion from E3 get extra rewards.
By the way thanks Jugbot_One, you guys are kickin some serious heiny over at Juggernaut games !!!