Those who have pre-ordered the title from GameStop and obtained a beta voucher will be able to access the beta on September 1, whereas those who purchased the June issue of Sony's downloadable video magazine Qore have to wait until September 8.
"This information only applies for North America," community manager Seth Luisi wrote on the game's official site. "Details about the SOCOM: Confrontation Public Beta in other parts of the world will be announced by the regional Sony Computer Entertainment offices."
I got the Qore issue for the beta but I'm not really excited for this. I never played any socom games and the videos so far looked pretty shitty. I'll still download and see though.