] Scientists have created a miniature medical computer out
] of DNA that can detect cancer genes in a test tube and
] respond by releasing a drug. Proving what had been only a
] concept, the feat offers a vision of how medicine might
] look in the future.

[ NANOTECH! well, we're getting there, slowly... -k]

Injectable Medibots: Programmable DNA could diagnose and treat cancer: Science News Online, May 1, 2004