[nradov]

FHIR is relatively new and still in draft form. It would be a bit unreasonable to expect vendors to put a huge amount of effort into supporting a standard that's still in rapid flux.

Most of the major EHR vendors do now support a significant subset of FHIR resources through read-only APIs. And several of them have publicly committed to start offering limited write APIs by the end of 2018. We have to be a little bit patient.

As for purchasing memberships, well HL7 needs some revenue to keep the lights on. A small company can purchase an annual membership for as little as $1450, and individuals can join for even less.