Looks like they're releasing a 'Lore' server, which more or less means that guild types are restricted in the classes/races they're allowed to have.
http://www.sblore.com/
from the FAQ:
Loreplay Server - A new server will be brought online that will contain limits on what Races and Classes can join a Guild Charter and only allowing guilds of the same Guild Charter Type to swear fealty to each other (meaning a High Court can only swear fealty to other High Courts). Furthermore, restrictions will be in place only allowing Nation Members to group together and disallowing the casting of peaceful powers on members of different Guild Charter Types (For example, a member of a Noble House can only cast peaceful powers on individuals in their Nation or in another Nation that is based on a Noble House guild charter).
Best pvp game ever, btw.
