A very worthwhile project, an orphanage in El Salvador that provides a home for 140 persons with disabilities, desperately needs volunteers this summer:
http://help-international.org/hogar-del-nino
http://hogarproject.blogspot.com/
Students typically make up the bulk of the volunteers. If you’re interested, you can contact Rachel Nielson.
Even if you can’t go, please spread the word to others.