Ideas for stuff to put in custom computer case?

I just got a old radio case with a lot of extra room in it for other stuff besides my computer. I'm already going to put a car radio in it but I want some other ideas for other random stuff to put in it.Ideas for stuff to put in custom computer case?
water cooling?





cold cathode lighting.





fish tank?





edit: oh





how about a card reader?


there's always this http://www.thinkgeek.com/computing/drive鈥?/a>


and you can't go wrong with built in speakers

eye look