This new version with the automated newsletter generation is awesome! LOTS of great features and options to tweak!
So far, I've got this setup with my Sendy installation to:
Automatically import Sendy "Brands" and "Lists"
Create "Subscription Lists" in the addon that allows new (and existing) members to subscribe and manage subscriptions.
Generate a scheduled recurring (weekly in my case) newsletter that is pushed to Sendy.
The auto-generated newsletter leverages criteria "weights" to determine the "best" threads