It’s not just developers who can earn cash from mobile apps, the pleebs can too! O2 in the UK has unveiled an app store that lets mobile phone users earn money by testing apps for their handsets and providing feedback to the developers. So all that time you spend in the blogosphere, testing Betas and giving back to the community can finally pay off. The site is live for customers and O2 has been asking for developers to contribute since back in December. Check out Mob4Hire for an idea of how the payment system will work.