Multimedia:

• Back to the Beginning
  Watch Hour 4 of the PBS/Nova Program Origins online
• The Dark Side of the Universe
  Watch Scientific American Frontiers' take on the cosmic background radiation, hosted by World Science Festival co-director Alan Alda

Online resources:

• Einstein Online
  Find out more about the foundations of modern cosmology, Albert Einstein's theories of relativity, on this website hosted by the Max Planck Institute for Gravitational Physics
  
• Wilkinson Microwave Anisotropy Probe
  The website of the NASA satellite responsible for the most precise measurements of the shape of the universe to date

Further reading:

• How the Universe Got Its Spots: Diary of a Finite Time in a Finite Space
  Anchor 2003. ISBN 978-1400032723 — an easy-going description of the mysteries of the cosmic background radiation by 2008 Festival participant, Janna Levin
• Big Bang: The Origin of the Universe
  Harper Perennial 2005. ISBN 978-0007162215 — an accessible tour-de-force of modern cosmology by science writer, Simon Singh