To learn how you can benefit from Launchpad Translations if you are maintainer, developer or translator, join in #ubuntu-classroom on FreeNode today (April 26th) at 18:00 UTC (20:00h for me :).

PS. There is one question I probably won't be answering, and that's why Launchpad is not free software: I don't know more than FAQ can tell you, and I hope it will become free software in the (again, I hope near) future, or I wouldn't be recommending it for your free software development either.