Logged in? I don't even have an account. Consider making the comment form available, with a request to log-in / sign-up on form submission. (Also, do you really want comments to be used for feedback as you've suggested here, rather than for comments on the value (or otherwise) of the educational resource?)
Yeah, making the comment form available would be a good idea. And I didn't mean that people should use them as feedback to me, but to the author of the link description. Need to add a way for people to edit the descriptions.
What I meant was, do you intend comments to be used for feedback on the educational resource for the benefit of your site users, or for feedback to the author of the link description? If I use comments to contact the link author, and they update the link or description, then my comment will be out-of-date. (Which is not to say that users observations on linked sites won't go stale, but less so.)
I, too, see no way to submit a comment when logged out. I think the interface is the problem here - when you are logged out, it should say "[Sign up] or [log in] to leave a comment.". That would guide the user on how to create a comment. It's not obvious that you have to sign up first, because some site allow users to leave anonymous comments.
