Because it works on so many levels, this talk by Dan Barber was by far my favorite of TED 2010.  

Without spoiling the talk for you, I love the way Barber takes us on a walk through his life, and has a conversation with us all along the way.  And it's a funny one at that.  His insights changed the way I think about the relationship between oceans and food; prior to this I did not recognize that one could create an aquatic version of Polyface Farm.  Amazing.

This talk is also a master class in public speaking.  No, in public story telling.  This talk defines the bar by which we should measure pitches for a cause.  This is how to start a movement, how to get people to sit up and take notice, take action.

Awesome.  And now I'd like to try some of that Spanish fish…