I use SVN for all my projects, too. It's very handy, if you take enough care and commit changes often. You will have an easy time figuring out where any issues were implemented, as you can go back to any previous version with just a few clicks.
It's of course also useful for exchanging data. Give everyone involved access to the repository and you'll never have to manually send or replace files again, you just update and it's there. I also give the translators all the necessary data so that they can always build the most recent version of the game themselves, allowing them to test changes right away.