An other great example of web-based education. The American Society for Cell Biology has launched a unique project and they feature seminars through the web (so-called webinars). You can download iBioSeminars in QuickTime, mp4, iPodVideo or Powerpoint formats.
iBioSeminars is a freely available library of seminars from outstanding scientists. Our mission is to host lectures that describe on-going research in leading laboratories (they are not basic, survey-style lectures as might be found in undergraduate or graduate student biology courses). However, iBioSeminars features a more extensive introduction into the subject matter than a typical 50 min university seminar. Thus, these lectures are intended to be more accessible than many typical department seminars to advanced undergraduates/beginning graduate students and researchers outside of the specific field.