A year or so ago there was a security researcher who claimed that he had machines which were being compromised through some sort of side-channel attack like this. It was reported on a couple times on Ars Technica I know, and there was debate in the security community whether he was on to something or whether he had simply snapped and was being paranoid. As I understood it he was a well-respected guy in the field. What ever happened to him? After reading a couple reports, and that he was going to be sending hard drives to some colleagues to get a second opinion, I never saw any followup. Anybody know?