The above site includes a DIY for making those beautiful chunky shelves. Love the styling on these shelves as well.
Same source, another great styling/use of floating shelves. I love how this has feminine aspects, but is balanced by the metal orbs, and the bull.
And since Caitlin from Desert Domicile is so great at styling these shelves, here's a little how to.
What do you think of floating shelves? Have you used them in your house?