Please note this is an infopanel plugin for nUI, a standalone interface, and thus requires it to work.
For those people that like to separate their Guild Chat from the rest of the chatter then this is for you.
Utilising the InfoPanel section of nUI it sets up a GuildChat window where all guild related chatting will appear. This includes the Message of the Day as well as Officer chat where applicable and Achievement messages for guild members.
Currently only enUS and enGB languages are available at this time but the ability is there to incorporate for those that wish to translate the localization file.
Just extract the file and place the extracted folder into your Interface/Addons folder just like any other addon.
If you wish to comment or suggest improvements please post them here : http://www.wowinterface.com/downloads/info12921-nUIInfoPanelGuildChat.html as that is where my addon time is spent.