Just hit level 9 in Japanese tree. Amazing program!!!
If anyone wants to see what the Japanese tree looks like at the moment, install the "Duolingo Stats" script from here: http://duolingo.wikia.com/wiki/Duolingo Userscripts, and then look at KEIsuke.1's profile, and click the "show the tree" button.
...I hope that's ok, KEIsuke.1 :)
The course will change between now and release - it isn't finished yet.
I am using a test account here and to be honest, I feel like I accomplished more in an hour of Duolingo than a day of studying. While I sadly don't have much time to work on the course. It is probably one of my favourite courses I've done! It's very theme based and doesn't have too daunting grammar skills like 9 lessons of verbs in the past tense (I'm looking at you Spanish).