A very interesting video, featuring Chad Cowan, was uploaded on YouTube a few days ago. In the video Cowan talks about his team's recently published study, named: "A TALEN Genome-Editing System for Generating Human Stem Cell-Based Disease Models". TALEN stands for Transcription activator-like effector nucleases. The study focuses on using TALENs for creation of iPS cell isogenic control lines for disease modelling.
The study is available here