It allows you to reward the people that create brilliant content on the web.
You choose how much you would like to pay a month then click the Flattr button on participating sites. At the end of the month Flattr take that money and share it equally amongst the people that you have Flattr’d. Click here to see their explanation.
Equally if you are a content creator, you place the Flattr button on your site and when Falttr-ers click the button you get some money to support the effort you put into the creating the content.
Brilliant. The challenge for the Flattr team will be to motivate people to a) pay for something that they have only ever got for free and b) don’t need to do. It’ will be fascinating to see how this develops.