Wow. I'm a big fan of kiva.org. They make it super-easy to loan money (in amounts as small as $25) to needy entrepreneurs world-wide, with a 99% return rate. We stuck some of our "getting almost no interest from the bank anyway" savings into Kiva, and made 14 micro-loans around the world, all in less than an hour.
Check out our lender profile. :)
Talk about saving the world. I wish I had written that software. :)