I understand we may not need this yet, but also with an update to 1.8 coming up this could be useful
I recommend that we create a separate world that would just be for collecting resources, Diamonds, Emeralds, Gold, etc
This world would not be for building houses since every couple of weeks the world could be re-genned with world edit to bring the resources back.
When 1.8 comes out that means that this could be a steady source of granite, etc.