In short: http://aichallenge.org but using PA? Can PA be modded to create own AI's and let them battle against other AI's?
I'm certainly waiting to see if (and how much) I can script for my own play style, although it remains to be seen how much of that can be customised by the player themselves. In a related thread, Sorian has said he enjoys those kinds of competition himself, and he's lead AI programmer in PA so I reckon we'll see something to that effect