I mentioned in my post 2009 Predictions How Did I Do? that we are seeing more and more about Add-ins & Mashups as a means to build richer learning experiences. I particularly cited a DevLearn demo of twitter being embedded inside Captivate as the basis of a social learning experience.
They’ve posted on the Adobe Captivate blog - Collaborative learning using Captivate and Twitter. You can run a demo (18 mins) to see it in action. The basic idea is that students will be able to have a social learning experience utilizing twitter as a messaging systems within a Captivate course.