Have you seen sethbling's SkyGrid and want it for your server? You could copy the save file into the server, but that can be problematic. Players may leave the generated area or memorize where useful chests are. This plugin alleviates both of these issues by allowing bukkit to generate new chunks as needed, and uses the world seed to generate random terrain.
Official URL : http://dev.bukkit.org/server-mods/skygrid-gen/
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Servers using SkyGridServers: 1