It turns out that what I really need -- since I installed Community Builder and have disabled Joomla's core registration, using the CB user registration instead -- is a CAPTCHA for Community Builder.
Such a thing exists, but you have to purchase a subscription from CB -- and that isn't inexpensive. So I either have to go back and re-enable the default Joomla core user registration or I'm going to have to bite the bullet and subscribe to the CB community. I haven't really spent much time figuring out CB yet, and I've been debating whether Community ACL might be better than CB. I'll have to look into whether ACL provides free CAPTCHA which might tip the scales for me. Joel Brondos Brookfield, IL | Subscription info at http://www.tech-geeks.org |