It was recently announced that Starcraft II will not have LAN support and the internet has been a buzz ever since! Blizzards' Bob Colayco has made an official announcement about why LAN support won't make it into SC2.
Here is what Bob Colayco had to say:
"We don't currently plan to support LAN play with StarCraft II, as we are building Battle.net to be the ideal destination for multiplayer gaming with StarCraft II and future Blizzard Entertainment games. While this was a difficult decision for us, we felt that moving away from LAN play and directing players to our upgraded Battle.net service was the best option to ensure a quality multiplayer experience with StarCraft II and safeguard against piracy.
Several Battle.net features like advanced communication options, achievements, stat-tracking, and more, require players to be connected to the service, so we're encouraging everyone to use Battle.net as much as possible to get the most out of StarCraft II. We're looking forward to sharing more details about Battle.net and online functionality for StarCraft II in the near future."
There's obvious benefits to something being hosted entirely by Blizzard, and probably gives them flexibility for things they want to achieve with the game in the future, but lots of gamers are upset that they'll lose the ability to LAN, especially in places like Korea where the game is a televised sport.