New BizTalk Server Adapters site
Not sure if you've had the time to go out and view the new BizTalk Adapters site.
https://msdn2.microsoft.com/en-us/biztalk/bb544997.aspx
The new site includes a simplified categorization of the adapters, better organization, and some new adapter content. Very shortly this site will replace the old adapter site (https://msdn2.microsoft.com/en-us/biztalk/aa937652.aspx).
Expect to see new links added for R2 when it releases.