Lewis and Clark Dept of Physics: http://www.lclark.edu/dept/physics/
Palatine Hill Weather Station: http://www.lclark.edu/%7Ephysics/weather/wx.htm
Astronomy Picture of the Day: http://antwrp.gsfc.nasa.gov/apod/astropix.html
NASA's Imagine the Universe: http://imagine.gsfc.nasa.gov/index.html
Society of Physics Students (SPS): http://www.spsnational.org/
Diet Coke and Mentos
Other awesome physics videos (from previous weeks):
magnet in liquid nitrogen: http://www.youtube.com/watch?v=c3asSdngzLs