A few months ago I announced posting of a near final draft of this paper. The published version is now available: http://walden-family.com/texland/tb109walden-preprint.pdf [ignore the work "preprint" in the URL; this is the version as published] A year from the journal's publication date, that is, a year from now, the article will be freely available to non-members of TUG.org at http://tug.org/tugboat/contents.html in issue 35:1. By the way, if you are going to be around Portland, OR, in July, the TeX Users Group (TUG) is holding its annual convention there: http://tug.org/tug2014/ Tracy Kidder (Soul of a New Machine) and Ward Cunningham (inventor of the wiki) are each scheduled to be there for at least one day. TeX remains one of the longest-running open-source-software success stories, with vibrant user and development communities. -- home address: 12 Linden Rd., E. Sandwich, MA 02537 home ph=508-888-7655; cell ph = 503-757-3137 email address: dave@walden-family.com; website: <http://www.walden-family.com/bbn/>http://www.walden-family.com/bbn/