I've compared Twitter to a whole fanzine full of linos. Many of the 140-character-or-less "tweets" in my reading list are, indeed, mundane notes on what the author had for breakfast, or some such, but the people I choose to follow are a reliable source of brief, witty bons mots. I particularly recommend MaryRobinette, whose glimpses into her work with props and puppets are like found poetry.
kateyule is now on Twitter, as KateYule. (I'm on there too, as daviddlevine.)