The transhumanist movement is as outspoken as it is controversial. The ultimate goal of the transhumanists, also known as the H + movement, is to let man grow into a being with superhuman qualities, free from disease, death and decay. This comes to the mind of transhumanists to be strongly criticized from, for example, Christians, Neoluddites and pro-nature groups.
A short transhumanist manifesto (there are several) is among others here to read. I personally think that the mission of transhumanism is the fulfillment of the destiny of humanity and also in accordance with, for example, the principle in Christianity that we should make the most of our talents.