If you use your Mac to create presentations for marketing, sales, training, education, using either PowerPoint or Keynote, then ProfCast is a tool you need. It records your presentation while you give, and distributes it as a video Podcast.
All elements of your presentation, including slide timing and voice narration, are recorded. You can then publish your complete presentation on the Web as a PodCast, complete with RSS support.
9WR – ProfCast: PowerPoint, Keynote; sales, marketing, education, training presentation recording tool.