One of the talks that I found very interesting was "A Dexterity Intro for Recovering Archetypes Addicts", by David Glick.
In his presentation, David explained how he met with other people to brainstorm on what would be the future of Archetypes, and how they came up with Dexterity.
I really like the goals and philosophy of the people working on Dexterity: through-the-web content type development, possibility to switch back and forth between the Archetypes and Dexterity, reuse over reinvention, small over big, natural interaction over excessive generality, automated testing over wishful thinking...
Here are a few great features:
The talk made me really curious to see how it would continue evolving, so I subscribed to their development list. I can't wait to actually work on a project that uses it.