A friend of mine has recently asked that I put together a website for him.... A feature he wants (god knows why) is a chat room.
He needs to add moderators and have admin options... I wouldn't even know where to start. Googling has given me a ton Make Your Own Chats that an be done in about 10 seconds - but have nothing in the way of the options he's looking for.
I went to the Neilson's website once (I forget what it is now) looking for the same thing. They said they dont disclose ratings like that because they dont want that information to sway anyone's viewing habits.