Yes we didn't hear about Duolingo yet, here on Hacker News.
Kudos for all the work that went into drawing those words. Great job.
This is obviously not a tool to learn a new language, but it's a lot of fun, and you can learn some new words. (But it could use some algorithm for repeating words.)
Agreed. After trying Rosetta Stone, then LiveMocha (basically a web clone of Rosetta Stone, in terms of course style), I think that style is one of the least effective and most boring/fast to lose interest of all such learning tools. And this new tool seems to largely imitate Rosetta Stone.
I found Duolingo has a much more efficient way of teaching you the new language (words get stuck a lot faster in your mind).
For playful language learning there is https://www.duolingo.com. It's waaaay ahead.
(Edit: up to ~A2 level by only messing about with the app ahead)