The always excellent Social Design Notes tells the tale of a "tailored information" program in St. Louis which distributes personalized vaccination calendars to low-income parents - complete with the kid's picture - to remind them when to get their tykes which shots. The kicker? Vaccination rates have gone up 50%. A great example of a simple measure, made easier by new technologies, which improves life for people who've been having a hard time.
John's also got some good posts up about Zapatista media, the explosion of graffiti in post-war Iraq, activists and messaging, and a whole bunch of other provocative topics. If you're interested in both graphic design and changing the world and you're not reading SDN, you're missing out.
Wow, thanks for pointing me at that site. :)