I gave a talk at the Personal Digital Archives conference held at the Internet Archive in San Francisco, California on 24 February 2011.  The videos of the talks at the event are now available from the Internet Archive web site.

Here is a NodeXL map of the connections among the people who tweeted the term PDA2011 OR PDA11:

The top most between people in this graph were: @anarchivist, @blefurgy, @naypinya, @rodanda, @jeffubois, @scottros, @evancaroll, @kevinmarks, @vurayav, and @sshreeves.

Here is the video from my talk: