Spammers have figured out a way to abuse our guestbook in order to send unwanted email promoting unwanted scams. This means we're going to have to remove the guestbook button from the home page. Greedy people have ruined yet another good thing.
Removing the button and making the home page look balanced again is a few hours' work. This message is a placeholder to stop the abuse until one of us has time to do that work. We're sorry to have wasted your time.