I quite like this new challenge type. It also helps people learn obscure languages - for my answer in K, I just went through [this list on Wikipedia](http://en.wikipedia.org/wiki/List_of_programming_languages) and picked out interesting-sounding languages until I found one that worked. Code-golf also makes you learn obscure languages, but only short ones (J, GolfScript, CJam).
We could probably do with a better winning criterion than "most answers" - it's not that bad but I'm sure there are more interesting possibilities out there.