I just read one of the papers that is a part of this project, "An Analysis of the Dynamic Behavior of JavaScript Programs" (
http://sss.cs.purdue.edu/projects/dynjs/pldi275-richards.pdf), and I thought it was an excellent study of how JavaScript is used in the wild. They also have a more recent paper that goes into uses of eval in depth which I have yet to read (
http://www.cs.purdue.edu/homes/jv/pubs/ecoop11.pdf).
Also, it's worth noting that the authors have the code and data available from for their experiments.