They vaguely talk about the DF trade mechanics. Really the only info you get from it is that they keep talking about carvans and trade via ship so they must really be coding the game to force players to do trade this way. Which opens you up to being attacked by pirates or land bandits. Hopefully it's a good idea that leads to a lot of fun times protecting and stealing loot from enemy guild's caravans.

http://rpgvault.ign.com/articles/719/719331p1.html

Also one of the screen shots you'll notice a guild emblem painted on the back of the guy's plate armor. Question is, would you notice it on the battlefield and be able to avoid hitting a guildmate because of seeing it?

"It's not enough to win... others have to lose."
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