I gave this presentation a week ago, but forgot to post it. The focus is less on the range of tools available (lots more interesting stuff that I show here!), and more on the ways in which researchers do or could use presentation and collaboration tools.
Online Presentation Tools for Researchers: http://www.slideshare.net/umhealthscienceslibraries/online-presentation-tools-for-researchers
I am actually thinking that I should maybe do another presentation just on new and emerging presentation tools. Fun stuff!