It is surprising to me that the initiation of this textbook blog seems to have reduced, rather than expanded, commentary on SL (which I used to receive regularly by e-mail). It is not the case that fewer people are using the text. Perhaps the public nature the forum discourages participation? Or maybe nobody wants to be “the first”? If you have an explanation, I would love to hear. For now, I can only encourage you that I welcome comments, and that the public nature of the forum lets your discussion benefit others (and email is still fine). T.R.