This article was submitted and accepted for the International Lisp Conference 2012: http://international-lisp-conference.org/2012/
It describes the Lisp Interface Library, or LIL, that can be found there: http://github.com/fare/lisp-interface-library/
The home page for this article is at: http://github.com/fare/lil-ilc2012/
A PDF extract of this article is here: http://fare.tunes.org/files/cs/lil-ilc2012/lil-ilc2012.pdf
An HTML extract of this article is here: http://fare.tunes.org/files/cs/lil-ilc2012/lil-ilc2012.html
Note that this article was slightly modified since it was accepted and published at ILC 2012: a few typos and bugs were corrected, and the code was updated to mirror a few changes in the Lisp Interface Library.