Years ago when I was working at Kinko's, a college student needed transparencies made (you know, the clear sheets you place on projectors) and he felt the price was too much, so he asked, "Would it be cheaper double-sided?"
I've probably been asked dumber things, but that one sticks out in my mind.
My End of 2008 Hardware Predictions (console only):
Wii : 50 million
360: 28 million
PS3: 24 million
These predictions were made on January 3rd and won't be revised