Those looking to try Minecraft 1.12 right away can now join the test server I've prepared on Nena! To make testing easier, you'll have to connect to it to a separate address in your launcher:
You can also find a map of the world when the server is up using this address: http://play.creeperslab.net:8269/ .
Most plugins are there and available while I continue to run tests on some of them along with the permissions. The full 1.12 upgrade should happen soon if all goes well. In the meantime, if you find any issues or suspect that something isn't right, please let me know so I can look into it!