Sites

Upper Atmospheric Waves, Turbulence, and Winds: Importance for Mesospheric and Thermospheric Studies (Popularity: )
http://earth.agu.org/revgeophys/killee00/killee00.html
highlights some of the recent research efforts performed by U.S. scientists in the area of wave and wave-dissipative processes in the upper atmosphere.

Solar Mesosphere Explorer (SME) (Popularity: )
http://lasp.colorado.edu/sme/
includes the nitric oxide data gathered by the satellite.