Here they are in no particular order:
(Update: I took out the embeds because Ustream.tv has the ever annoying "autoplay" feature enabled and you can't override it. Just click on the name to watch the video over at Ustream.tv.)
Kyle David
The impact of social networking on volatility in the stock market.
Tim Hwang
Social wargaming, or ways to manipulate social media and influence online.
Matt Inman
Aka, The Oatmeal. Matt offers some of the best online marketing advice and SEO tips I have ever heard.
Other presentations worth checking out include:
Browncoat Redemption, Michael Dougherty and Steve Fisher
Brian Solis
Violet Blue
