I have setup a Google+ community for general NZB Unity comments, bug reports and feature requests.
Also, I have setup a second community for anyone interested in becoming a beta or alpha tester. While this is a private Google+ community, I'm happy for anyone to join at the moment. Just send me an email or message via the form on the website and I'll send you an invite.
Development on Sonarr is coming along with a beta expected within a week or so. Alpha Testers will have access later this week.