Do we have the technology to build a bionic human?

Scientists have developed artifical bones, cartilege, lymph nodes, hands, arms, some complete organs, and even parts of the brain, but there are potential downsides, including immunorejection, possible cancer (from stem cells), and corrosion and wear and tear with electronic devices.

(Source: http://technology.newscientist.com/article/dn14256-do-we-have-the-technology-to-build-a-bionic-human.html)