Sarah Robbins (and some friends) on Twitter vs Jaiku and others and the future of IM.

Note: Social Presence (SPS) systems aren’t about “Lunch” “Shower” “Cab” that dull narcissistic catalog of an unreflected and unsurprised life but about “giving the URL of a great website, a snippet of a news story, or a link to a new blog post. The conversations aren’t one sided either. Lots of folks start their messages with an “@soandso” to direct their messages in reply to another message. Jaiku has comments on entries so sub-conversations can start as well.” Right on Intellagirl.