Bukkit

To adjust the message format, run the plugin once then modify nChat/config.yml in your plugins folder. Change the message format to your liking. The available variables are:

+prefix - The player's group prefix
+suffix - The player's group suffix
+group - The player's group
+name - The player's display name
+rname - The player's actual username
+world - The world the player is in
+message - The message the player sent
+timestamp - A timestamp. You can customize its format in the config.