Here's an updated version of the genealogy graph (in PNG and SVG formats, and the graphviz source file i used to create it).  I've managed to get a only a little farther, but it is still an interesting graph.  Graphviz's dot tool is particularly good for genealogies because it tries to draw all ancestors to a node on the same rank....

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xkcd hits the nail on the head:

(At about 45:00 through his "Why multi-site?" podcast.)  "My point in showing you this historically is that every single church is on the contextualisation continuum.  The question is not, 'Will you contextualise?', the question is, 'What is the cutting edge of the year that you are on?'"  Some of his examples based on technology in use in our church buildings are: ...

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