Problem is, sometimes the walls of the threadless fork are not thick enough for the wedge nut and you can deform it. But of course, sometimes they are.

Actually, come to think of it.. If you find your fork has thick enough walls, you can push the starnut to the very bottom, and set it up like normal, but with the clamp that wearyourtruth is speaking to, take out the screw you used to tension it, and then put in the quill stem.

Or.. Even more different, you could take out the wedge, file down the bottom of the quill stem so that it is flat without a point, and use that in junction with the starnut and the clamp. Problem is, either of those are probably very prone to loosening up over a short period of time.