Because I don't spend all my time bashing fake homeless people, I draw your attention to this fine character's blog.
Andrew's had a decent life and by jove wants to give a little back. In honour of his 50th birthday in May 2007, he plans to climb Mt. Kilimanjaro and will try to raise 25,000 pounds for World Vision projects in Tanzania.
I eat that shit up. Check out Andrew's Kili50 Challenge
I would totally do something like this myself but can't imagine myself at 50 or having enough energy to do anything but beg for a handicap sticker for better parking opps by that time.