A case window wouldn't do much, it would show off the power supply and the blu-ray drive (which aren't pretty in the first place). And the whole motherboard is covered in a heatsink. I got an idea from a friend to make the LEDs along the Playstation 3 sign to sequence by using a 4017 and a 555 timer.
I could have made this mod better buy making the side intake fans internal, but id need smaller fans, some like 20mm or so. Not sure if they make them. Also I could have done (3) 60mm fans at the top instead of the 80mm