I've entered a design in the Mars Colony Prize from The Mars Society. This competition focuses not only on the technical aspects of setting up a settlement for 1000 people, but the economic model as well. Entries are limited to 20 pages, so it took me three months to solve all the problems and another month to get it down to 20 pages. Several competitors and other experts got together to share ideas.
One of them, Michel Lamontagne, was kind enough to look over my 2D Visio drawings of the habitat and make beautiful Sketch-up renderings, below. His model is a bit off my design, but it's close enough to give a beautiful sense of scale and design. Michel's entry, called Estepona, is linked here.
To see my Eureka concept paper, click here.