David, you are really welcome and I'm glad if it helped. Let me know how it went if you do adopt that approach. I think its really interesting looking at this kind of setup where an organisation like Scope hosts public/open seminars. You are welcome to use my comments as data but there is, in some contexts, a whole raft of issues to do with ethics here.
For instance, I would be thinking about how you would understand the data from different sources in such settings. By this I mean, who owns it or does not own it and for what purposes might it be used? You might also ask about my rights to regard this as usable data versus yours or anyone elses. These are potentially big issues because they raise different perspectives on the notion of giving and obtaining consent for such data to be used. Are we opening up new ethical issues if we regard this as 'open' data? I am working on a project and co-writing materials that would argue that we are already creating new ethical issues in these new formats and environments. It's really interesting actually (well it is to someone as sad as me anyway).
Anyway, these are all interesting issues but for now you may have enough stuff to deal with ;-) Good luck with it all and have fun. Let me know how it goes if you use it as well.
Nick