She's Acasia, and she's on ModelMayhem (4235919). Very good model who braved temperatures in the 30s that day. As for the feet issue, in this image she was wearing unattractive shoes, so I hid them. I don't mind bare feet though (you'll see hers in some of the other pics from this shoot).
Nice girl, beautiful model and lovely pose. Who is she? I always find it interesting too when on many locations, photographers tend to avoid showing the feet (shoes, dirt?) Not sure why.