Our friends at Doctorsgadgets have a short overview of recent replacement parts for the human body. Everything from an eye to an anus. These advances will inevitably lead to discussions about how far a person is willing to go to extend life. Humans currently accept false teeth, hair, and even limbs, but will they accept living in a body where most of the components are electro-mechanical? If the current debate about implantable ID chips is any indication, many will draw the line soon. Of course, it remains to be seen whether advances in electro-mechanical replacements will occur before biological ones.