A colleague just turned me onto this great website that lists oodles of opportunities to volunteer around the globe (which can be parlayed into stories to write about and ideas to pitch to publications). Idealist.com also is a good place to find a summer intern--which is what I've decided to do (business is so good I need a little help!). Conversely, if you are looking for an internship in journalism or various other fields, check out the postings on this site: www.idealist.org.
Gina