I don't think this is going to be confidential at all. This is going to be the public beta, just access is supposed to be exclusive to the buyers of "Medal of Honor" and maybe other EA games. In my box of Medal of Honor there was this little Battlefield 3 code in it. You can probably pick up a copy of MoH (with the code) for very little money now. The multi player was not so great, but it's worth the bucks for the campaign alone.
Cheers,
Frank