Nice selection of "meaningful jobs." But the listings are US only (though the other features have international support). When will you expand the "meaningful jobs" to the UK?

Looks good!

Jobs that help humanity should be touting it directly -- a major selling point.

I'll see what good stuff I find there.

scottalpert, you might consider another part of that site, http://open-source.fiveyearitch.com

I'd say that writing open source is another kind of positive social impact. You can do that in your spare time, but if you can do it on the job, all the better.