TΦ101 just updated its discussion of  podcasts with some links to some new podcasts we have just discovered, including the semi serious "Partially Examined Life" blog and podcasts. Today, two of the best sources for on-line philosophical content are iTunes University (for podcasts) and YouTube for videos.  We haven't found a systematic way to search what is available on either of these sites, but just typing in terms or the names of philosophers in the search boxes brings up a remarkable variety of materials.