Much thanks goes out to the following:
acpi-support (note: the discussion list for ACPI4Linux is now at acpi-devel)
TLDP mailing lists (discuss and docbook)
Sebastian Henschel for reminding me I'd promised to write it all down
Erich Schubert for writing the section on DSDTs
Werner Heuser for suggesting I submit the document to The LDP
Tabatha Marshall for editing and generally being very enthusiastic about learning DocBook