Annoyingly, a systemwide Blogger glitch has caused yesterday's post on telephones to disappear, along with some queued material. If it doesn't reappear over the course of the day then I'll simply re-post.
[Which is to say: thanks to those who kindly linked to yesterday's post, and I'm sorry that that link is now broken. I hope it comes back.]
[As of 3pm: the link is back, but yesterday's comments have disappeared. Alas.]