I invested a few hundred dollars at Prosper.com. You are making person-to-person loans of small amounts for one to three years.
I have made about ten loans and, even when three loans went bad, i.e. stopped paying, the overall returns have been positive.
http://www.prosper.com/
I was wondering if anyone knew microlending institutions such as Kiva, but where lenders earn a small interest on their money. Thanks.