I think I agree on the one-instance option as well. It will just lead to a better feeling of an international community.

Here's the multilingual module package for Drupal. I would like to have it running here ASAP

http://drupal.org/project/i18n

Thanks for the contact info for Svetic. I would like to have the UI a little more stable before others see the site. But we should start putting together the next round of invites.