I've actually seen this in operation. It's not up to much (beyond a miracle!) right now but it does allow some quadrapelgics to move cursos by thought alone.
Alex
-- Alexander Tabarrok Department of Economics, MSN 1D3 George Mason University Fairfax, VA, 22030 Tel. 703-993-2314
Web Page: http://mason.gmu.edu/~atabarro/
and
Director of Research The Independent Institute 100 Swan Way Oakland, CA, 94621 Tel. 510-632-1366
