On the Zend Developer Zone today they've published the latest episode in their ZendCon Session series (as recorded at ZendCon 2010), a talk from Matthew Weier O'Phinney about document databases - Documents, Documents, Documents.
Welcome to the ZendCon 2010 edition of the ZendCon Sessions. The ZendCon Sessions are live recordings of sessions that have been given at previous Zend Conferences. [...] In this series we will be releasing sessions from ZendCon 2010! This episode of The ZendCon Sessions was recorded live at ZendCon 2010 in Santa Clara, CA and features Matthew Weier O'Phinney giving his talk: "Documents, Documents, Documents"
You can listen in one of a few ways - either via the embedded player on the Devzone site, by grabbing the mp3 itself or by subscribing to their feed to get this and other great episodes.