[JohnDenver]

I heard something about this on the radio today. It's a new type of material with many potential applications, including bizarre lenses with near infinite resolution:
http://rsphy2.anu.edu.au/nonlinear/research/lhm/

Apparently this is a hot, rapidly evolving field. You can get an idea of what's going on by Googling "Left-Handed Materials".

There may be energy applications:
"According to Yong Zhang, an additional feature of their material is that it inhibits all reflection. When considering the refraction process, reflection can be thought of as a sort of energy-loss penalty paid by waves when they are refracted, and so a reflection-less lens would be of enormous value in, for example, the transport of high-power laser beams."
http://physics.about.com/b/a/035483.htm