This is mostly spread across different issues in our issue tracker (https://gitlab.com/gitlab-com/infrastructure). I suspect we'll write up a blog post once all the moving parts are in place, have been tested/used for a while, etc.
I think it's great that they are being completely transparent about this.
That said, it's true that it's been almost two months and it seems that the some important issues there are still open and don't look especially active.