Thanks for a great free script that was easy to install and use. Take a look how I modified some of the design: www.igoed.org/guestbook/index.php . All the little information on the left side leaving only the picture and the text on the right side.
What feature would I like the most? Picture verifiation to avoid spam but I guess your flood check should take care of the worst bots. Thanks again. If you need some hosting for the file let me know.