A few years back I tried out lendingclub.com as a way to invest money that would have otherwise sat in a CD. I did not invest a lot, but enough to see how well it would perform and I'm glad I did. The returns have been less than the stock market but have been far better than a CD and with similar risk.
I'm not a brilliant investor by any stretch but if you have a few extra dollars around, you might want to look at lendingclub.com. If you click the link and sign up, I'll get $25 but don't worry about me. Feel free to take any great offer you can find.
For me, my return was a little over 6% for the last few years. Hard to beat.