(also includes the screen saver edition)
So hop over there. You can also download the C and perl source, if you'd like. Or just run the objective C version here. Complete with screen saver. :)
No, it will never ever ever generate anything even remotely interesting. Sorry. Maybe the G5'll have enough power to generate something cool.
Pixel Combiner requires any Macintosh running OS X 10.2.x or higher.