IntoMobile went so far as to look up all the John Davidsons on LinkedIn. There are quite a lot of them, some with jobs in technical fields. (I hope this person isn't in your network).
This lucky winner is a resident of Canada, homeland to BlackBerry-maker Research In Motion. Perhaps jdavidson31 is an employee or contractor with RIM who wanted to make sure the device was kept in the dark until its official release, which hasn't been announced yet.
In any event, the old saying appears to hold true: A fool and his money are soon parted.