A Twitter sceptic writes

When Twitter began - or soon after - it was quite a dull place to be unless you had an interest in the fantasies of teenagers in California or Korea ... or indeed were a teenager in California or Korea.
In the intervening months, we've been getting our heads around using networking sites for learning - and there are all sorts of questions that aren't answered by the inevitable enthusiasms of the the zealots.
On the one hand, it seems pretty clear that Twitter is a good tool for following a conference or lecture or whatever - here's an experiment at the Oxford Media Convention earlier this year. It's also good for link alerts and shares ... probably slightly better than dedicated link sharing tools because of the 'here/now' side of it. So we're giving that a go with a College of Journalism account and a hashtag to pull together tweets from other accounts that college users might want to share.
On the other: how do you measure whether this is a learning success?