1. Posibility to publish user mail not clickable link like eg.
user<img src="monkey.gif" alt="A monkey"/>gmail.com
This prevent before spambots.
2. Posibility to store more information about user like version of browser, operation system, host name (I think this is better than IP number), and publish it next to user nickname.
3. Posibility to publish only part of IP number, eg. from 184.108.40.206 show only 66.249.66.* , or part of host name eg. from crawl-66-249-66-12.googlebot.com show *.googlebot.com
4. Posibility to install and using guestbook without Exec-PHP in any other .php file, not only on page with ID.
5. Support language in "po" file.
Thanks for answer to my suggestions and sorry for my English.