In addition to the program to run their own parcel shipping network, referred to as "Consume the City", it also mentions an interesting experiment called "I Hav

In addition to the program to run their own parcel shipping network, referred to as "Consume the City", it also mentions an interesting experiment called "I Have Space", which allows Amazon to utilize excess capacity in warehouses owned by third parties. Note that Amazon has already launched "Seller Fulfilled Prime" for third party sellers which meet certain metrics.