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Here's the criteria they were after, from the article:

It must be cheap. Total budget for all materials to make a 100" diagonal 16:9 screen, including frame, must be less than $100.

It must be simple and quick to assemble. We did not want to make a lifetime hobby out of making a screen. We wanted the materials to be easy to find, and we wanted to put it together in less than two hours of invested labor.

It must be easy to install. We wanted a no muss, no fuss solution with a fixed frame that we could hang on a wall in a matter of minutes.

It must perform!!! We had no delusions that we could invest a hundred bucks and a couple hours labor and come up with a screen that would match the quality of the Stewart screens we use in the projection labs. But how close could we come? That was the challenge. And as you will see below, the results were surprisingly good.

If the cost of the screen is what's been holding you back from buying a projector, perhaps a frugal DIY solution such as this one will be your tipping point.

Article: Make a 100" Screen for under $100]]> http://www.househacker.com/permanent/Make-a-Hundred-Inch-Screen-for-Under-a-Hundred-Bucks top 20 overall projectors.]]> http://www.househacker.com/permanent/Find-a-Home-Theatre-Projector-with-this-Exhaustive-Database candle's flicker, perhaps more so for those of us unfortunate enough to be experiencing the first hit of old man winter. People of all climates, however, can appreciate the beauty of these stainless steel oil lamp shadow projectors, by Adam Frank. The projected shadow size is "adjustable", obviously dependent on the base's distance from the wall. The site claims this to be the first in a series. The fuel cells lasts 17 hours.]]> http://www.househacker.com/permanent/Beautiful-Oil-Lamp-Shadow-Projector version.]]> http://www.househacker.com/permanent/DIY-LCD-Projector