Feb 122012
Free Money Factory, mentioned here and here, is an Android specific app that you can use to try apps and games on your Android device and get paid for it.
When I first signed up they only paid via Amazon gift cards, but they are now also paying via PayPal and Cash (via Western Union).
See proof of payment here. Remember to use coupon code (or invite code, whatever they call it): 12575 after you install the app to get free bonus points.
Have fun earning!