I just came across this amazing site a couple days ago:
http://www.shelter-systems.comThey sell dome tents that are easy to put together, relatively light weight, and quite durable.
The site is poorly organized, and there is some cool information on the site that I never found until I did an image search of the site here:
http://images.google.com/images?q=site%3Ashelter-systems.comThe tents are nice looking, evidently easy to set up, and they are pretty cheap as compared with other temporary structures of equivalent size.
Here is a size comparison page:
http://www.shelter-systems.com/sizes.html...and a page with a ton of photos and testimonials (beware: a little hippie type nudity):
http://www.shelter-systems.com/yurt-dome-testimonials.html...and here is a page that describes building a model of their design:
http://www.shelter-systems.com/modle.htmlI suppose the industrious could build an actual tent from the photos and models on the site, but beating the cost of buying one direct would be hard to do (if you consider labor costs).
Very cool site.
Here is a less elegant solution for those of you without the cash or an industrial sewing machine...
http://graphics.stanford.edu/~munzner/dome/cover/--gabe