mesheconomy.com

Well, not strictly mobile payments, but....

[July 2010] Techcrunch article

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"How does it work?

Pick how much you’d like to spend per month, for example €3. Then, whenever you see a Flattr button on a blog or website that you like, click it.

We count up all of your clicks at the end of each month and distribute your monthly spend between everything you’ve clicked on. Simple, right? Of course, you’re also welcome to add a Flattr button to your site and get other people’s support too."