Glenn, what a great topic and list of guiding questions to consider.
I have blogged at some time at my blog Silence and Voice and find myself using Twitter on a more regular basis (I Tweet at http://twitter.com/jeffreykeefer). Thus, I have my Tweets stream to my blog once a day to try to capture some of this information.
I blog as an opportunity to reflect on my work and thinking, as well as to share some of my work in the larger community. I find blogging about my research very useful, as the urls that are established make it easy to point back to a specific time or location or frame of thinking as needed. I find my own posting slowing down a bit as my Tweeting has increased. As I find less separating them, they are both becoming increasingly used elements in my work.
Finally, as my research has transitioned from blogging to microblogging to social media in general, it presents interesting opportunities for realistic next steps as I (hopefully!) approach my doctoral thesis topic.
I really look forward to using this SCoPE session to collaboratively think through some of these ideas.
Jeffrey