Chronology of what was authored in the year 2007
From the April LispSea (Seattle Common Lisp) meeting, Topics in Lisp Programming, source code from the Lisp manipulation of C structures presentation has been contributed to WikiBooks:
Notes and all source code from the presentation are on Github.
Mistakes with corrections are in the commit history, but the README file addresses those points.
(Just in case anyone might be interested, SBCL 1.0.2 .fasl files are also avilable for MacOSX 10.4/Tiger PowerPC in their own git branch.)
Edit 2017-04-19: Added Github, and updated Wikibooks link to new location