I was involved with some very early-stage development of the site JustMeans.com, back when it was a fantastic idea (social networking for social entrepreneurs) with a poor platform (a clunky and buggy website).
Just now, however, I learned that Founder Martin Smith spent the past three months in India working directly with the site developers to move it to an open-source design, and now it's so much better.
JustMeans provides networks, jobs, and news to thousands of socially-minded young people, while creating a unique forum that connects corporations and individuals who are passionate about finding solutions to today's problems.
If you haven't checked out JustMeans yet (or even if you have), definitely take a look: http://www.justmeans.com/
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