At Imagine there was a roadmap revealed to state that Bluefoot would be integrated into Magento 2.3 - but in the meantime (& in case that timeline slips) the only way to get it is through an enterprise agreement, v2.1 or greater & by contacting Magento.
Magento will be providing more details on the integration roadmap in
Q1 2017. In the meantime, the current version of Bluefoot CMS (v1.0)
will be available exclusively for licensed Magento Enterprise Edition
or Enterprise Cloud Edition merchants with Magento version 2.1 and up.
Merchants can obtain the extension through their CDM or Account
The 2.3 integrated version will almost certainly require a rewrite of any code that interfaces with Bluefoot.
On contacting Magento regarding getting Bluefoot, I got the reply:
The Bluefoot extension is not available to be integrated at this time.
It will become available once it has become integrated into the
Magento software in a future version release.
So I guess that Bluefoot is now off the table until 2018.