Maybe we should measure MMO success by degree of pop-culture status: Has Maple Story had commercials featuring William Shatner, Mr. T and Vern Troyer? Will Puzzle Pirates become a theatrical film anytime soon? No, but that doesn't make these games any less successful in their own right. Plus, that's a ridiculous way of measuring success. There's a lot of differences in these games, but one thing is for sure -- World of Warcraft is definitely a successful game.