Moon 101
I stumbled upon an excellent lecture series called "Moon 101 - A Course in Lunar Science for non-specialists" , which was presented by Dr. Paul Spudis and other lunar experts to NASA Johnson Space Center employees from June-October 2008. The lectures cover a range of topics related to lunar geology and exploration in a form that's easy to understand. They are available both in video and PDF slide forms. Although the website says the videos only work with Internet Explorer or Netscape, I found that they worked just fine in Firefox on a Mac (not Safari though).