I consider myself a transhumanist, meaning that I'm in favor of upgrading the human body with technology. I hope that one day we'll be able to use technology to make ourselves immortal.
About My Inner Philanthropist (why I give):
Basically: Suffering and death are bad. Life and happiness are good. If I can eliminate some amount of suffering and death with donations, then that's what I want to do.
Here is a story that inspires me to give: http://yudkowsky.net/other/fiction/the-sword-of-good