If you mean a wingsuit that can let you fly all the way to the ground at a speed low enough to land and survive -- then no one ever will. A wing that's big enough to have those low speeds will tear off your arms.

Popular Science had an article in 2003 examining wingsuits and the futile effort towards using them to land without a parachute, and they had a great diagram illustrating the problem: http://web.archive.org/web/20030623234930/http://www.popsci....