Like, I suspect, many programmers, I have a ton of things lying around on my hard drive that I've not sent to the CPAN because "it's not ready yet". At a Portland Perl Mongers meeting the other day, Michael Schwern presented a bunch of modules, some of which were put on the CPAN partially formed in the hopes that they might benefit someone. As a result, I was inspired to go ahead and put AI::NeuralNet::Simple on the CPAN. It needs word, but my lack of tuits ensured that it would never leave my hard drive unless I just got off my tail and uploaded.
If you're interested, feel free to give me feedback on the code (particularly the C). The examples/ directory has a nifty example of a primitive game character AI.