We’ve mentioned Charity: water before, but if you haven’t checked out their blog, you should. Charity: water is an active group of creative individuals doing their part to provide clean water to people who need it. They've got a wonderful blog that catalogs their goals and successes with inspirational pictures and videos.
Here’s a recent vimeo from the blog that shows a window into the life of a Rwandan family who must walk quite a distance to get water every day:
If that tender story doesn't do it for you, Charity:Water also boasts some celebrity backing that might get you interested. Hey, look, Depeche Mode!