Some new nanoantennas that are similar to the other printable solar panels that have been posted in the forum. They still have to figure out how to harness the power into usable electricity.
http://www.inl.gov/featurestories/2007-12-17.shtml (http://www.inl.gov/featurestories/2007-12-17.shtml)
http://www.ecogeek.org/content/view/1329/ (http://www.ecogeek.org/content/view/1329/)
The second link is shorter but have some funny comments down on the page a little.