A friend just pointed this site out to me tonight. Paybox is apparently an up and coming online payment processing company, much like the popular PayPal. Right now they have a special where new users who sign up are labeled as Early Birds. By taking surveys and giving feedback, you earn money in an online account on a daily basis before the full version of this service is launched. Users can also earn money by referring their friends at a rate of five dollars per referral. From what I was told, you can't cash the money in, but once PayBox is launched, you'll be able to use it for goods through a number of online stores, including eBay which I use very frequently.
There are a few rules. You must take at least one survey per week, and you must subscribe to them either through e-mail, or through a number of available social networking sites including Facebook and Twitter.
All in all it sounds like an interesting experiment to try out, and I'd advise anyone who's curious to go ahead and sign up!