The below will be out next year, a new collection of essays on Intermedia, my chapter is on intermedia, games and the magic circle. Looking forward to finally seeing this in print!

Travels in Intermedia[lity]: ReBlurring the Boundaries, Bernd Herzogenrath, ed. Interfaces: Studies in Visual Culture Series, Dartmouth College Press, 2012. NB Not in stock or not yet published, expected: June 2012. URL: http://www.upne.com/1611682595.html

UPDATE: appears to be available at Amazon.com