You might want to join the perl-ai@perl.org mailing list.

Ken Williams presented AI::Categorize recently.

I just read an article on the Semantic Web recently and the following quote tickledme:

it is a curious phenomenon that the AI label tends to get dropped once the problem AI researchers were studying becomes tractable to some degree and yields practical systems. Voice recognition and text-to-speech, expert systems, machine vision, text summarizers, and theorem provers are just a few examples of classic AI tech that has become part of the standard bag of tricks. The AI label tends to mark things which aren't yet implemented in a generally useful manner, often because hardware or general practices haven't yet caught up.

I recently authored Array::PatternMatcher which is a Perl transliteration of the Pattern Matcher presented in "Paradigms of Artificial Intelligence Programming: Case Studies in Common Lisp" by Peter Norvig. I was going to create some sort of CPAN module after that that offered Prolog semantics with Perl syntax but thought it wiser to create perl bindings for SWI-Prolog instead.