I was pretty sceptical. Part of Twitter's problem is that it is called "twitter". Had they called it "Concise", it might have been less easy to deride, and would reflect some of its character as a concise way of announcing activities or news.
Going back to Michael's dim sum comment, there's not much we can do about that twitter now, is there? Too late. But on a few occasions I've read Twitters by people passing through London or heading where I planned to be. I've wondered why they thought anyone might be interested in something so trivial, but took the opportunity and have ended up having dim sum or a pint. Like a lot of these new fangled interwebby things, it's how you use the tool that makes the difference.