I take it you mean the "sysops and truster reviews only" thingy?
The idea is that anyone can join one of the teams, if the existing team members approve him. Elian suggested to use individual ratings instead, but I think teams are important because they represent aggregated trust. Ratings themselves can be low-quality, so you need a reputation system of some type to get the good ones. Nevertheless, the team thing should be very community-like and open, a bit like SETI@Home, where competition and cooperation work well together.
I don't think the one cow articles would ever be certified, but when we import information from a trusted source like the US Bureau of Census, we could certify all those articles under that name, provided the bot has not made mistakes.
Regards,
Erik