In addition to the updates Nike recently made to the Twitter RSVP System, Nike has also updated the process for purchasing high-demand releases in the Nike.com online store. For select high-demand products, you may receive a message that states: "WE SAVED YOU A SPOT IN LINE!" after you click to add the product to your cart. This does not mean that you are guaranteed to get the product, but that you are in line should the product become available. If the product does not become available, you will receive an "Out of Stock" message.
It is important to note, that you should keep the window open and don't refresh your screen. If you close the window, you lose your spot in line.