Existing material appears (also) at EvangelismSupportMaterials and PromotingPythonBof. Note [http://psf.pollenation.net/cgi-bin/trac.cgi/ticket/160].
Magazines that Accept Technical Articles
[http://linuxjournal.com Linux Journal] [http://www.linuxjournal.com/xstatic/author/index Author Guidelines]
[http://www.ddj.com Dr. Dobbs Journal] [http://www.ddj.com/authors.htm Author Guidelines]
[http://byte.com Byte Magazine] (no guidelines found; may not accept non-staff material)
For active discussion on advocating for Python, please join the mailing list at [http://wingware.com/mailman/listinfo/marketing-python]
WellKnownPythonPrograms - you may already be using Python!