General Presentation Skills

Digital Copyright

A good discussion on copyright law and creativity by a Stanford Professor.
http://www.ted.com/talks/view/id/187

This site is also good for improving listening and learning about presentation skills.
http://www.ted.com/

Lectures from top US faculty
http://www.academicearth.org/

Youtube for education
http://www.youtube.com/edu

Great blog and book
http://www.presentationzen.com/

Presentation Software/Webware
http://www.readwriteweb.com/archives/4_ways_to_quickly_create_excellenct_presentations_online.php

Presentation Skills resources
http://www.writing.eng.vt.edu/slides.html
http://www.io.com/~hcesres/tcm1603/acchtml/oral.html

Improving pronunciation
http://www.uiowa.edu/~acadtech/phonetics/english/frameset.html