In last month's HGTV magazine there were photos of Genevieve Gorder's home and she has floating stairs:
btw, I could not find the photos on HGTV magazine's site, so had to settle for this crappy one from Google images. :(
Since Genevieve has a young daughter I would have loved it if the article on her home had included something about how she keeps her daughter from leaping off the side of the stairs.
These don't seem all that practical for young children but I love them anyway. I'd feel like I was walking up a set of shelves.