I believe they did release the source code, not far from here: http://vpri.org/fonc_wiki/index.php?title=Installation_Guide (may be outdated, you may want to ask the FONC mailing list, may not work on your machine… it's a proof of concept anyway, not a hardened engineering artefact).

Their writing is here: http://vpri.org/html/writings.php

Their various reports are there (most recent first):

http://www.vpri.org/pdf/tr2012001_steps.pdf

http://www.vpri.org/pdf/tr2011004_steps11.pdf

http://www.vpri.org/pdf/tr2010004_steps10.pdf

http://www.vpri.org/pdf/tr2009016_steps09.pdf

http://www.vpri.org/pdf/tr2008004_steps08.pdf

http://www.vpri.org/pdf/tr2007008_steps.pdf