Today, Amazon.com says that they will not be taking preorders for the PS3 and Wii Preorders are not for sale. In fact they think that they might not be able to send you your Wii or PS3 until 2007. Amazon states that they might not have any shipments of the PS3 at all. However, people who already ordered the Wii *should* get their systems after the launch date (expect a delay).
If you want a PS3 or Wii, go order it somewhere else or buy it at someother place, like Target.