If you’re an American Express card holder, they want you to vote on the project so that it can obtain funding.
There are a slough of creative social change projects in Second Life. Another one I learned about at Northern Voice last year was a project to sell virtual yaks to buy animals for actual Tibetan families. The virtual yak gave virtual milk. What was cooler, though, was that they hadn’t done any walking animation for the yak, so it was more of a HoverYak™.