I'd like to see CB integration with the Zookoda newsletter service (zookoda.com). For newsletters, I've used the YaNC component for more than a year, and have also used Letterman.
But many people with Joomla sites don't have the time or expertise to send their own newsletters or email outreach.
Zookoda takes RSS feeds from your site content and builds them into a newsletter that it sends automatically. All you have to do is create your site content as you would do anyway. The email-based outreach to the community happens automatically.
To me, it seems a no-brainer that CB would want to integrate with this.
BTW, I discovered Zookoda because the DOCMan site (
www.mambodocman.com/
) uses it, and DOCMan's dev, Johan, is now Joomla! lead developer, isn't he?