Best Answer - Chosen by the Asker
Dude, seriously. You can't learn a language while you're sleeping. So: No, it doesn't exist for Finnish.
You can just listen to tapes when you're awake though. I'm not sure if Pimsleur has Finnish lessons but you might try and google for those. (I'm not really a fan of Pimsleur though. It's quite annoying to properly learn stuff.)
