The Bazaarvoice iOS SDK by Bazaarvoice allows API interaction to integrate marketing features such as Q&A's, feedbacks, and reviews into applications. Resources include installation, requirements, and running tests. Authored by Jason Harris.
Here is an interview with Dr Stuart Battersby, Chief Technology Officer and Founder of Chatterbox.co - a sentiment analysis engine that utilizes machine learning (yes that all familiar buzz word) to social media conversations (even more prevalent buzz words). However what makes Chatterbox.co stand apart from social media err,chatter is it's clever use of hard core computational performance of machine learning with insightful and creative business use cases.