WorldEdit CUI is a client mod that allows you to visually see your WorldEdit wand selections as you make them.
With this mod installed, you will be able to see your region's as you make them, and have an edge when protecting your creations.
The minecraftforum.net link is:
http://www.minecraftforum.net/topic/885099-124-worldeditcui-worldedit-client-user-interface-v124/