Jukola

I used to study French at Livemocha before that "change" and haven't really used it since... also lost some contacts. The Finnish study material is "meh", other languages like French and Spanish has much more better material. But the idea of real people correcting you is good. I have helped some people there, and got lot's of "tokens" (or what ever currency they are using) and used that for purchasing other stuff there.