Dear readers: Apologies for our site’s absence yesterday. Apparently we were the target of a Russian spam attack. We’re back up, but we’ve had to close comments for the time being (except from the TOTM authors and previous guests who may login to post a comment). We’re working to get everything up and running again as soon as possible. In the meantime, if you’d like to post a comment, please email it to one of us (our email addresses are available from the “Email” page) and we’ll post it as soon as we can. Thanks for your patience.