From Myanmar's NET:
Zero Administration Guestbook 1.3: this is a free ASP code, which is a self-managing asp guestbook, making you maintenance free. You will not need to worry, whether your guestbook got too large and too long. It backups your current guestbook entries to a new file whenever a month pass by (in the format of yyyy-mm.htm files). So that you can still keep your friends' sweet old comments and suggestions. See it in action.