Tommy Edison, the Blind Film Critic (yes, for real) has been blind since birth, so he's qualified to answer that question:
Hit play or go to Link [YouTube] - via The Body Odd"So I've bee blind since birth, so I've never seen anything in my life, so one of the things that you guys wonder about, is if I can see in my dreams. I think because I’ve never seen in real life, my sub-conscious doesn’t know what it’d be like to see, either, so, no. I don’t see in my dreams”