With CounterStrike: Source, comes the ability to create some amazing modifications to the game. Modding first person shooters has been happening for a long time (e.g. mapeditor for Wolfenstein 3D), and some of the best games of the past are being ported to the playability of the future. To wit, there is a modding community dedicated to bringing Goldeneye to the Halflife 2 game engine. Which hopefully will makes its way onto the new server.