I'm excited to announce that everyone with a discourse.mcneel.com account set up with an email address that was used to validate a Rhino 5 license now has access to Serengeti. Serengeti is where we talk about the Rhino Work-in-Progress (WIP). The WIP will be released someday as Rhino 6.
Please check out the Welcome to Serengeti post for a download link. Also read up on other discussions about Rhino WIP in this category.
Please keep your discussions about Rhino WIP inside Serengeti.