Rosie Swalepope, a 57 year old British runner, is running around the world to raise money for several charities, particularly the Kitezh Community for Orphan Children and The Siberian Railway Cancer Hospital, both Russian children's charities. She started in Russia and is averaging 40k per day. She's currently 2,000 miles east of Moscow and is entering Siberia. You can read periodic updates on her website.
I'm always inspired when I read about ordinary people doing amazing things!