In the summer of 2002, I served on a committee investigating possible scientific misconduct at Bell Labs by J. Hendrik Schön.
The American Physical Society has set up a permanent site for the Report of the committee. I had a lot of responsibility for Appendix E, which summarizes the technical issues behind the allegations.
UPDATE, May 2007: I gave a talk at the Cornell Center for Nanoscale Systems on this subject in March 2006. The audio, video, and slides are available here.