The biggest criticism of Starcraft II is based not on its gameplay or what it has to offer in terms of content, but the prevailing lack of connectivity between continents. Players in Europe are, at the moment, unable to play with their counterparts in the United States and Asia, making global tournaments impossible.
That said, Blizzard plans to remedy the situation by allowing linking the servers together, which will allow players worldwide to compete against, or play with each other.
Starting with Season 3, Blizzard intends to link the North American and Latin American communities together. Likewise, Korea and Taiwan, and Europe and Russia will also be connected. While this isn't the worldwide solution many are hoping for, it's a step in the right direction.
"First and foremost, a linked community means a larger pool of players to improve our automated matchmaker. Whether you're an elite Grandmaster of a Bronze-league all-star, more players in the mix means that we'll be able to find you a matchup more quickly and accurately.
"Players will also get access to a broader range of custom map games, which in turn means wider audiences for mapmakers. Those of you who have friends in the linked region will also be able to add them to your Battle.net friends lists once the region linking is complete."
Blizzard says that players will not have to do anything, for the entire linking process will be automated server side. Further details can be found here.
