Visitor Feedback on YOUR blog

I will soon be part of a panel at AASLH on visitor feedback and new technologies, so I would like to get your feedback and experiences. If you are a major player in your institution's blog and/or online presence, please consider responding to some or all of the following queries (in comments or email to lynnbethke at gmail dot com).

So tell me, what kind of visitor feedback do you (or your institution) receive through your blog and other online ventures (tagging ventures, twitter, facebook, and so on)? Do you solicit feedback through your online presence, or accept it passively? Do you acknowledge feedback in some way? Do you address this feedback internally? Externally? Do you mind if I get in contact with you to learn more?

Your help is appreciated, and any presentations I develop for this panel will be shared on this blog.