I would like to thank everyone who posted those useful references.
Regarding Foucault on media, I would suggest _The Politics of Everyday
Fear_, edited by Brian Massumi, Minnesota UP, 1993. The book has its ups
and downs, but there are some good essays on the media. For a more rigorous
philosophical approach, I would suggest Deleuze's book on Foucault,
particularly the discussion of phenomenology and Heidegger and "visibility."
(I don't have the page numbers handy. Just look under "Heidegger" in the
index.)
Thanks again, everyone.
mani
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