Below is a list of useful links to government, private, and university websites, as well as publications dealing with solid state lighting.

Government websites:

U.S. Department of Energy - SSL Program

U.S. Department of Energy - Office of Science

Solid State Lighting at Sandia National Laboratories

Defense Advanced Research Projects Agency (DARPA)

Lawrence Berkeley National Laboratories (LBNL) - Light Distribution Systems

Pacific Northwest National Laboratories (PNNL) - Environmental Molecular Sciences Laboratory

University websites:

University of California, Berkeley

Georgia Tech University

Lighting Research Center, Rensselaer Polytechnic Institute

Publications:

Photonics Spectra (magazine)

LEDs Magazine

LED Journal

Changing the Light Bulb; No Joke: LED Technology Fuels Fast Growth in Once-Staid Industry
Wall Street Journal

Other:

Solid State Lighting.net