To anybody getting their copy tonight/tomorrow/Friday.
There are problems redeeming some pass codes on the 360 with errors of "Pass already in use". Do not worry as EA and Microsoft are aware of the problem and working to fix it, if your pass code doesn't work you can still play online with the 7 day free pass.
There is also a method that some have found to work.
Hope this helps a few people.
See Kris, XBOX 360 fails.