David McRitchie sent me an email correcting a couple links:

David McRitchie's notes at:
http://www.mvps.org/dmcritchie/excel/xlnews.htm
http://www.mvps.org/dmcritchie/ie/oe6.htm
http://www.mvps.org/dmcritchie/ie/oe6nws01.htm

Tushar Mehta's notes at:
http://www.tushar-mehta.com/misc_tutorials/oe_ng/