If your server needs so many rules or commands that you must devote an entire board or room to it, you're doing it wrong. The commands you need should be self-explanatory and only displayed when necessary. For instance, the "buy" commands from a shop or counter would only be shown when you are inside it or near it. The "sell lumber" command could be shown when you gain your first piece or when you enter a resource trading area. "Check Money" commands shouldn't be necessary and definitely not forced to be used every second if you forget - use a GUI or modification to the player HUD to show stats like in the CityRPG servers.
The tutorials to the Valve games are a very good example of this - you get told what you need, when you need it and it isn't in your way. Portal: Upon walking into the second room of the game, you get a small message, "E - Pick up objects". When you do pick up the object needed, it goes away. This is shown a few times during the introductory area and then players can remember it.
