title_body: How does Kindle know my login at first boot? I have just received my Kindle Paperwhite, which I ordered through my Amazon account (it was not a gift).
  
  I've connected the usb cable, it started up. Connected to my wireless, and then I am presented with a screen saying "Hello &lt;my_name&gt;"! I was pretty amazed (and a bit creeped out at the same time)
  
  Do any of you know how this auto-logged in to my account? Is it factory set to the buyers account? I guess this could not happen for gifts. Did it found that out by my wireless AP somehow?
upvoted_answer: From the manual, it tells you that if you purchased the device through Amazon then they use your Amazon account information and register the product to you before they ship the device.  Definitely not mining your wireless AP :)
  
  
    Registering your Kindle
    If you bought your Kindle online using your Amazon account, it is already registered to you.
    To verify, tap the Home button and look for your Amazon user name in the upper left corner
    of the Home screen. If it says My Kindle or shows the name of a previous owner instead of
    your own Amazon account name, you'll need to register it. See Setting up your Kindle
    Paperwhite in this chapter for instructions on setting up and registering your Kindle.
  
  
  Here is a link to the userguide:
  http://kindle.s3.amazonaws.com/UserGuide/Paperwhite_V2/Kindle_Paperwhite_V2_UserGuide_US.pdf
  :)