After a few years work on my methodology and design theory courses at the NABA School of Media Design and Multimedia Arts, I put together some useful pointers on the topic.
First of all, two or three links on John Chris Jones, a contemporary classic.
Then, a list of the works mentioned in class — a real stub at the moment!
Finally, a list of the videos wonderfully discussed by Bill Buxton as examples of sketching methods and cases.
