NB provided a useful background paper with lots of prompts and I along with 4 others tried to log on to the twitter page and have a conversation - albeit limited to 140 characters. Most of us managed to get onto the page but one of us was not aboe to see everyone else and we couldn't help him with the problem.
I think we all fumbled beyond the basics of posting a message and we never had a structured discussion. I didn't find the hosting page at all helpful. There should be a way of putting up some basic instructions about the timing and format. I came away with the impression that it has to be essentially for people who are already familiar with twitter rather than for complete novices.
Neverthless we are committed to trying to run a series of events from next week so we have a real need to learn how to do it quickly.
Postscript - not surprisingly there were lots of email exchanges afterwards and JC did a splendid job of highlighting the potential benefits of twitter for 'students'.. the upshot of the discussion was that we agreed that it would be more sensible to host a week long event..