Twitter is Continuous Partial Presence, mostly made up of mundane messages in answer to the question, “what are you doing?” A never-ending steam of presence messages prompts you to update your own. Messages are more ephemeral than IM presence — and posting is of a lower threshold, both because of ease and accessibility, and the informality of the medium.

good analysis on twitter. i haven’t tried it yet, but maybe i should? looks like a big time suck

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