It's been interesting watching the evolution of Twitter amongst some people. In some cases it's evolved from a service that allows people to post observations/thoughts/news about one off subjects, into a public instant messaging forum. It's really hit home in the last few weeks, especially when following tweets from some of the LIM regulars - you know who you are :-)
It's like the old days of IM clients, but whereas they were largely closed conversations, you now follow sometimes quite extensive and often protracted real time conversations between users. I'm not necessarily saying that's a bad thing - obviously if the topic is something I'm interested in I'll chip in too, but sometimes it's irritating as my timeline fills up with one dominant exchange between two or three users.
And the other thing....where do people find the time to do this?