I've somehow ended up with three Amazon accounts under the same email address. Two on Amazon UK (which appear to be shared with Amazon US and Amazon DE), and then a third on Amazon JP (which only appears to work there). Very confusing at times (I've ended up putting a deliberate misspelling in my name -- Stpehen instead of Stephen -- so I can tell at a glance which account I'm on).
Interesting. Just reading this now, but it makes me wonder, what happens if you set two accounts to the same password?
> you can create two accounts with the same e-mail address, but you will get into trouble if you try and give them the same password. I'm not sure what happens, so try it and see.