i must do a programming project of my own choice.
kind off says it all ...
you're supposed to choose it yourself, so you can take a topic that you find interesting so you'll stay motivated.
another reason is because they want to see whether or not you are capable of deciding on a topic in which you can use all the techiques you've learned so far.
The AI is realy interesting but i'm wondering if one yeay could be sufficient; just the XOR function stoped the research for more that 20 year in the neural network!!!
but if you'r interested you can consult this adress just for insperation. http://neuroph.sourceforge.net
Hope this helps