BroadcasTheNet (BTN) is a ratioless general television tracker. It's generally regarded as the best television tracker around.
A while back, there was some drama when someone on BTN started blabbing about their Scene connections.
Getting an account
BTN is currently not recruiting. They have "invite lotteries" every few months where high-ranking users can bid their bonus points on invites for their friends, but don't count on getting in this way.