I don’t like to bandy one of the “B” words around, but Stephen Downes’ E-Learning 2.0 in Development and E-Learning 2.0 Why the New Tools? presentations are brilliant. Essential viewing to gain a foundation about the innovations happening in eLearning.
http://www.slideshare.net/Downes/elearning-20-in-development
http://www.slideshare.net/Downes/elearning-20-why-the-new-tools/