I love the idea of having a pebble floor in a bathroom to massage your feet as you step out of the shower. A lot of tile manufacturers have come out with mosaic pebbles that can be installed on walls and floors. The only thing that I don't like about these pebble mosaics is the gap between the stones is rather large and you end up seeing as much grout as you do stone. I think a nice alternative to those of us who don't want to go through the process of re-flooring our bathroom is this awesome river bed pebble rug from Ksenia Movafagh via nova68. The aesthetic of this rug is fantastic!