http://kotaku.com/heres-a-fully-functional-stargate-in-minecraft-1579694480
Seems like a really good idea for HUB world.
Uh, read the comments... Apparently this is done in vanilla minecraft using a crap-ton of command blocks!!
Also, here's the full video: http://youtu.be/hOvKXu5z5Pw
He makes it sound like it was easy...
Since command blocks can not be crafted this is still an admin build.
Just figured it could be useful for a gateway of some kind without needing client side mods.
Command blocks or not this is pretty amazing and simple too when you think about it!
Very cool find!
Anything goes on the hubworld. you can make it in mcedit for all I care.