Finally a concurrency framework that works with Python 3! I will definitely have to check this out, because Twisted is the only thing preventing me from switching (and Gevent doesn't support it either).
The porting process is slow but sure, fortunately. Some parts already work. It'd be cool if we stopped hitting broken stdlib functions. (Turns out that sometimes regular quotes did actually mean bytestrings.)
What about concurrent.futures from standard library?
It's not really a concurrency framework, just some tooling. It does absolutely nothing to provide evented-IO for example.