I think Diigo opens up a lot of possibilities for online conversations. For instance, check out the comments on the first blog post at whitehouse.gov (http://www.whitehouse.gov/blog/change_has_come_to_whitehouse-gov/)? One thing I see possible is to engage people in a conversation on a site, even if the site itself isn't actively engaging with visitors (not allowing comments, etc). The whitehouse.gov people can still see what people are saying about their work--and they'll have to start paying attention if a group of activists focusing on them. I'd love to explore this idea with your help--what do you think?