I wonder this too. My boyfriend says since we have no kids we have no chance. I did see a couple without kids winning special seating for a parage in MK last year.
When we went for my birthday last year I had a birthday pin, but we didn't win any dreams.
We don't have any kiddos, but from what it sounds like...handing out dreams seems like a pretty random process. I had thought the same thing too about maybe only families with kiddos getting them. Here's to hoping we get one. We head for our anniversary trip in less than two weeks!
It is just my DH and myself and we won bunches of Dreams when we were there in Jan 07. We went back at Thanksgiving and did not win a thing and could not have cared less. It is a random process. Good luck and have a great time. Even if you do not win, you are at Disney, enjoy!!!