Hi Sebastian,
Well, it was meant to be a secret 
In reality, this is a work-in-progress. The session in the London meetup was mostly a discussion around the design choices, and a demo of a very early prototype.
I’m not sure when it’ll be ready to release, hopefully soon. Keep an eye on GitHub, and given the interest, we’ll announce it here. There’ll hopefully be a JuliaCon talk.
Regards
Avik