I have already told you about ASB in the "Spring Break" section because I really like the concept and I was surprised by the number of students engaged in the project (about 400 students!).
I have just found some blogs about their experiences: http://buasb.wordpress.com/trip-blogs/
If you have few minutes, just read and have a look at their pictures!
BU Today makes an article about the team which was in the Bronx to help children, the students said that "this is a life-changing experience". (http://www.bu.edu/today/2012/alternative-spring-break-bronx-bound/)
So if you have the chance to participate next year, don't hesitate!