That's great news. Keep doing it. I was thinking about using finite state machines to generate eye-catching structures. I'm guessing that you are using genetic algorithms to create populations of lurepets and improve them using users' input.

You could build a google app engine web app to do that. Users that will train your genetic algorithms will get discount for their t-shirts. You would use google "in-app" purchases API to sell your t-shirts. If you get enough data from users you can try to personalize, e.g. association rules, if someone bought t-shirt A then he is likely to by t-shirt B.

Note to self: web app that uses genetic algorithms to improve its product and association rules to sell more is also a data mining web app.