This was going to be a Minedeas 2 contest entry, but I got a better idea! UPDATE: That other idea got 7th place!

For a while, I have been developing the idea for a multiplayer plugin, or a feature in Minecraft, that allows sever owners to create plots and organize land and property with the server controlling players' building rights in set areas. Similar effects can be gained from WorldGuard, but what is proposed is a much more comprehensive and specialized system for organizing land.

Starting out, all land on the server would be "public" land, meaning that any player can use doors, buttons, and other interactions, but building is limited (a config could change which blocks players are allowed to change and interact with).

Server staff would be able to use a tool (possibly by the plugin being paired with WorldEdit) to select regions of any shape or size. The region would by default reach from the sky to bedrock, but could be set to only go down to a certain level, which would be helpful if the staff wanted players to be able to mine unrestricted.

Once a region is selected, it could be set as plots of private land, secret land, or quarry land.
- Private land plots could be given or sold to players for them to build on with few or no restrictions (depending on config settings). This would literally become their property.
- Secret land would only be accessible to staff. Other players would be unable to enter the region.
- Quarry land would be a resource collection free-for-all (though certain limitations could be set in a config).

Not finished, I may add more here possibly!