super70s - 1:18 am on May 26, 2013 (gmt 0)
I used that "HTML Gear" guestbook of Tripod-Lycos' from 2001-12 until they retired it in Apr. 2012. It worked good, was dependable, and there was only one ad (theirs) on it.
People had pretty much stopped signing my guestbook anyway (I guess everyone who wanted to already had after 10 years) so I just got rid of a guestbook altogether.