Hehe, fantastic captcha solution you've got with the baby and the kitting!
Love your script, it was supereasy to set up. I'm using it on the admin part of a google maps based app, listing points with option to edit or delete, all done with you ajax script, cudos to you, very clean stuff!
To those asking for the script, all you need on the client side is available right on the page, just view source and copy everything and paste it into a new document. But change /search.php to point to wherever you want it to reside on you server.
then you need to actually create the search.php and build a script that searches your mysql database. there are so many ways to do that, so i think it is a tall order to ask perturb to write a complete tutorial on that, but if you are a complete noob pop over to w3schools to learn the basics
but heres the skinny: the first line in the output of search.php needs to look something like this
thewordsyousearchfor:12:000.9
where 12 would be the number of hits your sql query returned and 000.9 would be the time it took for your search to complete. I cheated a little because I didn't want to show the number of results or the time it took, so I just hardcoded that part (my javascript skills are not good enough to clean that stuff up I think). the rest of the php-script outputs pure html, something like
link to your article
link to your article
link to your article
i might write a post about it on http://pappmaskin.blogspot.com, great stuff