Paul Smith is trying to travel around the world in an unusual way -- in a way that nobody has tried to travel before. He's using only resources provided by users of the microblogging / networking service called Twitter.
He's utilizing various methods of technology so that people can track where he is at any given moment on the globe. He will only move if a Twitter user helps him and if nobody from Twitter gives him accommodations, I guess he's sleeping under a bridge or on a random park bench somewhere.
Along the way he is also raising money for the non-profit organization charity: water (which I've written about before).
Go check out the Twitchhiker web site to see where his location is. You can follow his progress. And if you're a Twitter user maybe you're in a location where you can help. Or donate a few bucks that he can pass on to a wonderful charity.