Designing for E-Participation and for Deliberation

Chris Birchall has a fantastic new post on his blog about interface design for e-participation and designing systems for deliberation.  He quotes work by Beth Noveck that highlights a set of 10 values "to which online systems must adhere in order to foster real deliberation" as well as Ann McIntosh's "ten key dimensions of e-particpation initiatives".  Check out his great post here.

What are your thoughts about how technology can effectively support deliberation?  What has worked well--and what hasn't--in your experience?