Yeah, think you a re supposed to be 18 to be an official tester.
I've been testing Microsoft BETA products for some time now, was on the first wave of WLM and have been on the first wave of Vista and Office BETA. Just got Windows Vista Beta 2 working last night, pretty good, much smoother than previous incarnations of the program but the security system, while toned down, still drives me nuts and I ended up turning it off.