Anti-Glare Computer Screens That Work in Sunlight?

Belfont9 asks: "The company I work for operates in a very sunny climate, and our facilities rely almost completely on natural light. The problem for our coders is that all that light makes reading a computer screen for many hours truly painful - even if we use the standard 'anti-glare' screen covers. Dimming the entire rooms (eg through the use of shades) isn't an option. Could the Slashdot community suggest some good computer screens for use in such conditions?"