Tubes

Two new sites for your consideration...

TeacherTube is essentially YouTube for teachers. Motto: Teach The World - which has unfortunate 70s resonances for this old-timer.
Anyway, they say:

TeacherTube officially launched on March 6, 2007. Our goal is to provide an online community for sharing instructional videos. We seek to fill a need for a more educationally focused, safe venue for teachers, schools, and home learners. It is a site to provide anytime, anywhere professional development with teachers teaching teachers. As well, it is a site where teachers can post videos designed for students to view in order to learn a concept or skill.
http://www.teachertube.com/

Authors @ Google is a collection of videos of authors talking about their (recent) work. The videos were derived from a series of informal lectures arranged by Google & as far as we can see, cover the literary waterfront with everyone from Martin Amis through Simon Schama & Hillary Clinton to Joseph Stiglitz & beyond. (Note that this is hosted by YouTube & is therefore considered dangerous by our IT chums).
http://youtube.com/atgoogletalks