Quantum "Photonic" Computers a possible reality?

http://www.dailymail.co.uk/sciencetech/article-1312936/Scientists-develop-new-photonic-chip-pave-way-quantum-computers-future.html

A Photon is a particle of light (if I am not mistaken) does that mean we will soon be able to make computers out of particles of light? I have heard of some other interesting types of computers being researched.

Protein Computer
http://www.treehugger.com/files/2007/09/an_ultrathin_anime.php

 Nanotechnology
http://en.wikipedia.org/wiki/Nanotechnology


What are the moral consequences of these developments inn technology? Are such systems stable and what potential is there to use complex machines inappropriately/maliciously? If you are able to control the functions of a Computer the size of an Amino Acid there must be the ability to influence the Biological systems of Organisms. I am excited whenever I read editorials about new age research but I can't help but feel like there is opportunity for failure and disaster in technology developments.