StarCraft II Delayed Until 2010
Blizzard has just announced that StarCraft II: Wings of Liberty won't be released this year. From their announcement: "Over the past couple of weeks, it has become clear that it will take longer than expected to prepare the new Battle.net for the launch of the game. The upgraded Battle.net is an integral part of the StarCraft II experience and will be an essential part of all of our games moving forward. This extra development time will be critical to help us realize our vision for the service. ... As we work to make Battle.net the premier online gaming destination, we'll also continue to polish and refine StarCraft II, and we look forward to delivering a real-time strategy gaming experience worthy of the series' legacy in the first half of 2010."
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Here's how it works for pretty much every console and PC game out there:
Each client sends up their external and internal IP address. the internal IP can be used for routing if the external IP matches. i.e. if you and your buddy hook up halo and play each other behind the same NAT, you do your matchmaking on XBL but your game packets never leave the network. You can sniff packets on your home network yourself to verify this. So unless Starcraft has suddenly become a client server game then your bandwidth is unaffected.