Sigmatech Newsletters:
Vol 1, #1: Mar 2006 (4Mb pdf)
Vol 1, #2: Nov 2006 (2.5Mb pdf)

Vol 2, #1, June 2007 (2.3Mb pdf)
Vol 2, #2, Nov 2007 (2.3Mb pdf)

Vol 3, #1, July 2008 (1.3Mb pdf)