-Flattr is a social micropayment platform that lets you show love for the things you like.
-Help support the people you like and enable them to continue with what they do.
-Add your own things to Flattr and receive appreciation from others.

Sincerely, I think it's all wonderfully explained on this video

From my point of view, I think this would be an interesting way to motivate users to participate more (making reviews, publishing news...) as well as a possible economical support for the forum.
As a sample of the lines above, you can check my signature.

Edit: I just realised I have been given a couple of invitations. Drop me a line if you'd like to join.

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My blog about Go and Boardgames: Alejo's Tenuki

From Flattr's FAQ:

10%??? That's HUGE if they actually get much traffic with this concept.

Other than that, I sort of like the idea. Not sure, though.

Yeah, I agree with that... 10% would be huge if they were to get that much traffic. But I'm quite certain they'll modify that percentage if numbers were higher.

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My blog about Go and Boardgames: Alejo's Tenuki