If you have been following Defrag from a distance, Sean Ammirati at Read/WriteWeb has an awesome summary up titled Five Themes From the Defrag Conference.

1. The Attention Economy
2. Next-Level Discovery
3. Social Graph
4. User Centric Identity
5. Enterprise Customers Arrive

In addition just summarizing what was covered, Sean has very insightful paragraphs after each one under the heading “My Take.”

Also, a very thorough summary of many of the sessions was blogged by Charles Knight at AltSearchEngines.