The release date is all set -- Turnover will be released on December 15, 2015, and will be available on launch for Windows, Linux (64-bit), and Mac.
Only two weeks to go!
Post Release
Sometime after release, I'll be opening up a public beta branch to give everyone an opportunity to test new features and fixes. I have an update in the pipeline, and hopefully I can make that available to the beta branch sometime after Christmas. More info on the beta branch will be stickied in Discussions, so stay tuned!