I gave an introductory presentation about NPMap to a group of NPS web authors today, and thought it would be cool to post it to the web so others can take a look.
Here's the link: http://www.nps.gov/npmap/decks/overview-of-npmap/.
We plan on updating the presentation as we build new web maps and release new versions of our library, so it probably makes sense to consider it a "living document". Enjoy, and please let us know if you have any suggestions to help us improve our communication! You can reach us by email: npmap at nps dot gov.