You might have noticed that this site now has a search feature. It uses Zope's excellent ZCatalog.
I've tried to make it as googleish as possible with the statistics of how long the search took and spelling corrections. Please do try for example Search on ballon. I am working on getting more spelling correction alternatives but haven't yet figured out a good algorithm.
If you're having any idea behaviour with the search please let me know by posting a comment here.