Update: [http://www.respawnaction.com/2011/06/battlefield-3s-physical-warfare-pre.html]
Although a failed attempt with a prior Battlefield title, EA and DICE are once again trying to give pre-order incentive to would-be Battlefield 3 owners with the "Physical Warfare" pack that grants access to weapons, equipment, and other goodies that only those who drop $5 can utilize.
Everybody else, meaning those who don't pre-order, would be left out in the cold which of course is causing a stir among the internet.
It will be interesting to see how EA and DICE respond to this hullabaloo this time.
via Kotaku