There is altogether too much twitter about Twitter. But finally, at least, we seem to be moving from the mildly inane to the mildly sensible. From tipping the tuna, to unplugging. From the WSJ today: “I probably started removing people the first week,” said Ryan Irelan, 31, a Web developer in Raleigh, N.C., who began using Twitter last year. “This constant dinging of updates,” he added, “it really just became totally overwhelming. I don’t see how anyone could get anything done.” Honestly, d’ya think? That’s why they call it continuous partial attention. Update: Mark drops out; more to my point.