I've just discovered echo - I was planning to copy and paste a bit of on introduction from its website to encourage you to look - but it seems that it won't let me. Here's the link http://echo.to/en/discuss/search

The information below was from BenB via Coalition of the Willing http://cotw.cc/wiki/Coalition_of_the_Willing

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http://echo.to/ "The Global Agora" (found on Drumbeat)

"echo is a joint Open Source project for active citizen participation
- worldwide and for all people. echo addresses and unites all players
of society for a sustainable change.

"Discuss - Connect - Act!“ - The Social Software facilitates
constructive mass dialog crossing the borders of languages and
communties. It connects people sharing the same purpose worldwide and
supports them in creating joint actions."

...looks like a promising place to talk, play ANd act! (click the
'more' prompts on front page bullet list for enticement)