It's just really low-hanging fruit I think (the spec is crazy simple), and people are understandably excited to get to work on something of the sort vs. boring day job stuff.

I think we'll see a massive wave of python/javascript implementations, a few C/C++/C# ones, and then finally a trickle of novelty implementations in haskell, lisp, brainfuck, etc. This part could last for months. :)