I found this video
that might be of interest to you. It's about the change from "can do" (Usability) to "will do" (persuasive design) - by the founder of Interaction Design Association (http://www.ixda.org/index.php
IMHO Nothing new, but its always nice to hear someone else phrase it.
Hope to see many of you at http://www.db.dk/forskning/persuasive2010/