I think that there should be something like top 100, but the top 10. It should have it's own page. I think they should make a page for top ten of merits and also top ten game raters.
I don't think this is such a good idea. This gives people another reason, to just rate games, and get credit for it! There isn't away to see if someone rated a game or not, so this could get WAY out of hand.
ubertuna already set up a list of the top 5 merited users. I don't think it's a wise idea to do the same with game raters since it's fairly easy to rate almost all games on the site if you want to.