I have a plugin request involving a one time addition to a new players inventory the item being a compass when right clicked the compass teleports you to a random location on the map inside the boundaries of world border. Upon teleportaion the compass is removed from your inventory and ender particles are created around you to symbolize the teleport somewhat like a enderman.
Not a hard plugin to do, but if no-one picks this up, you can use the /spreadplayers command to do the same thing
Have you tried googling this? I am pretty sure there are plenty of options... http://dev.bukkit.org/bukkit-plugins/random-teleport/ http://dev.bukkit.org/bukkit-plugins/bestrandomteleporter/ http://dev.bukkit.org/bukkit-plugins/randomlocationteleporter/