This map is basically a blank flat map for testing designs on. There is a central main hub that has command block teleportation to different segments of the map that are reserved for different kinds of builds. There are four main categories for buildings and there are sub-divisions of the different types. There are a few sample builds in some of the areas (Particularly the housing designs section)

This is a good world for people who like to plan out their builds in single player before they try to build them in other worlds or SMP; the hub makes it easy to get to all of the different spots quickly as the world spawn is set to the center convenient location, and each destination has a return port to get back to the hub easily.

CRAP GUYS, I may have left out the iron door that was supposed to be in the redstone contraptions section of the main hub - the one with the big useless contraption out front that opens it. I've fixed the download so you can see the thing in action. Apologies again. D:

Additional Notes

This isn't a "finished" world; it's for design and contraption tests. Some ports lead to areas with path and others just lead to flat blank areas; there are a few test designs here and there already. Mostly, though, it's an empty map with an easy way to organize your test designs.