It's quite strange that there is no good GPL plugin for WordPress.. This one realy works. I did realy try them "all" ;) and it was frustating...
There are some ui gliches like:
1. when creating new category or tag, you can se translation setings but you havent create one. So you have to go and do update category or tag to create link betwean two tags.
2. Suport for custom types not just general post.
3. Force user to choose language on post/page creation form.
But i'm happy to find this one, it did save my day!!!!