A lucky few individuals will discover this invite for the MAG beta in their inboxes. The e-mail includes a unique code used to access a closed application form. According to the beta enrollment page, Sony "will be adding people in waves." If you don't see an invite in your inbox right now, don't worry: you may be invited later. "If you do not receive an invite for the first wave you may still be invited in a following MAG Public Beta wave."
Sony has already conducted a closed beta for MAG for over a month. The expansion of the beta to the public gives us hope that maybe -- just maybe -- we'll be able to see MAG's 256-player online battles hitting the PS3 sooner rather than later.