Colin Gordon has recently set up a profile on Academia.edu and is gradually uploading his collected works to this site. There are currently 20 items on this site with more to come. Most of these works are on Foucault. Some of the uploaded items include material which was not included in the published versions. For example:
Introduction (uncut version) to Michel Foucault, The Essential Works 3: Power, ed. James D Faubion. New Press, 2000
Foucault News 