There was a posting I read earlier that suggested painting the ceiling with flat black paint. I also was tossing around the idea with my own basement. My dad did so in one of his basement rooms and with proper lighting it looked great. I tried painting my basement ceiling in my old house with white and it looked awful-I had low ceilings and I thought it would give it brightness. Instead it just brought out all the flaws in the rafters and made the basement look dirty.