If you are interested in learning more about the keyboard TEMPEST story that was on the 27 Oct 08 show, the link to the researchers' site is
http://lasecwww.epfl.ch/keyboard/There isn't anything more here than was in the article linked to by the show but Martin Vuagnoux and Sylvain Pasini promise to publish their paper there after the peer review process is complete.
If you are a crypto geek, the rest of the site is a friggin treasure trove.
http://lasecwww.epfl.ch/