the term metagame itself is abstract, but for this case lets just say its the current enviroment for playing yugioh. part of the current metagame is the rampant abuse of cards like scapegoat and magicain of faith. metagame is the way others play in
your gaming community. This may seem rather odd if you don't know what it is but here is an easier example. If all your friends like to play fast speed decks your metagame shall be different from someone who's gaming group plays slow, high firepower decks. However due to the massive amount of yugioh web communites the local metagames have nearly merged with the nation-wide metagame at big events such as Regionals and SJC's. Did you know that they are even posting the top 8 decklists on the Internet from each regional event. This causes so much copying that orginality in the game has even less of a chance. That is basically why i posted my article, to find a deck capable of taking out the current meatgame.
As for the the new rules visit this link:
http://www.pojo.com/yu-gi-oh/FeaturedWrite.../2005/6-6.shtml