Anyone using transifex?

Hello, Forgive me if this is covered elsewhere. If it is, please let me know where to find it. I am working on the moblin open source project (moblin.org) and we are setting up transifex (transifex.net) to use to manage translations. I am looking for best known methods, tips, tricks, or other hints on how best to utilize this tool. Also, I am wondering about how to manage translators who volunteer to do work in their language. How do you qualify them? Is it considered bad form to solicit translators openly, or should I wait for them to come to moblin? Thanks in advance for your expertise! Regards, Margie Foster l10n project manager for moblin