I've seen several references to the PMF, and I'm wondering what it is, and where I can find good reference material to do a quick, deep, dive?
The Pragmatic Marketing Framework is fully detailed at this site.
The framework appears to be a vendor-specific model used by the Pragmatic Marketing company as the shared basis for many of their seminars and training services. According to one source, over 60,000 people have been trained using the framework... about the same as official Certified Scrum Master course completions as of year or two ago. This implies it probably has significant value as a shared language and as a reasonable taxonomy/ontology for product development and marketing topics.
As for a jump start, other than attending the official training, there appears to be quite a few articles available around the framework located here.
You can go to http://www.pragmaticmarketing.com/about-us/framework to learn more. It basically provides a breakdown of marketing tasks into steps so that organizations take a broader approach, incorporating metrics and planning into marketing (imagine that).