OK, I just found out that there's a bit of an issue with commenting.
Seems BlogCity doesn't want to allow you to add a comment unless you give them a name. If you've already done this, you have to log in again to the comment field, because when they revamped the user interface they seem to have wiped out cookies.
So when you want to leave a comment, there are three options: "Yes, I have a free account", "No", and "No, but create one for me". This means giving them a screen name and an email address to which they can send mail verifying that you're you and not a spambot. I have not tried the logging-in process, as this is my blog and logging in leads to me being logged in to the blog as a whole, but "No, create one for me" worked just fine and allowed me to post a comment.
Sorry for the inconvenience. I guess this would explain why no one's wanted to talk to me lately. ;)