Here are some important bits from Keystone's blog post.
The design challenge is to design a booth that best describes what Studio Wikitecture and the Wiki-Tree is all about. We have images that could be displayed, such as our final entry in the Open Architecture Challenge, screenshots of past Wikitecture projects, the most recent University of Alabama, and more. It is up to the community to determine how many images should be displayed, how they should be displayed, and how large those images should be.
The full booth can be no more than 175 prims, and the parcel size is 28 meters by 28 meters.
I, for one, would like to learn what images are recommended by Theory and Keystone. Maybe a starter set of images could be submitted with a tree leaf; then, they could be worked into any of the other designs…and other images could be suggested at that time.