For starters, get signed up to the Playstation Underground on Sony's Playstation website. Sony then choses certain underground members to become apart of their "Gamer's Advisory Panel" (my guess is that selection is probably based on website participation so fill out a profile, participate on boards, register games, etc.). Unfortunately, it took quite a while for me to get upgraded from an Underground member to a GAP member. And even as a GAP member, I was only invited to test SOCOM2, Syphon Filter:Omega Strain, and Resident Evil: Outbreak. And of the three, I was only able to join the beta tests of SOCOM and Syphon Filter because Outbreak quickly reached the 3000 tester limit. Hopefully some of you out there have better luck.