A guestbook, in the context of our website, is a type of logging system that allows our visitors to indicate that they have visited, and possibly express their thoughts about the site or its subject. It does not require creation of any account, as it is an informal method of dropping off a quick note.
Sorry but this feature doesn't work yet. We do our all best to launch it as soon as possible.
Thank you for your attempt to sign our guestbook anyway!