In-context learner collaboration via Twitter
Leverage the Twitter widget from Adobe to create courses that let learners collaborate with one another as well as the author by just logging into their Twitter account. They can ask questions, get answers, and access pre-existing discussions. - Adobe.com
Another new feature that catches my eye is hosting, tracking and reporting integration through Acrobat.com
Hosting and collaboration via Acrobat.com
Host published or in-progress eLearning projects on Acrobat.com, an Adobe CS Live online service, and share them with learners and reviewers, who can access them from virtually anywhere. - Adobe.com
Tracking and reporting
Satisfy basic evaluation needs at no extra cost by tracking and reporting key performance metrics, such as average score and pass or fail rates, without having to invest in a Learning Management System. - Adobe.com
Keep in mind it is not nearly as robust as what you will get from loading the course to your LMS, but it may work for those without an LMS and limited reporting needs.
You can read about other top new features along with some video previews here.