For those of you who love the barefoot experience, check out these Nike Footstickers. These are a concept design created by Dutch designer Friek Severs for Nike. The idea is to provide all the freedom of the barefoot experience while minimizing the risk of injury. Stepping on a bed of nails is still probably out of the question. But the added traction can prevent you from slipping or twisting an ankle.
Each of these is sets of footstickers are designed for a specific activity. The above footstickers are supposed to be used for yoga. Below, you can see footstickers for cardio training and then dance. Thanks to Behance Network for the pics/info.