There's an alpha version on the site, with the beta coming soon, final version will arrive at launch.
I believe so, you will need a gia certificate though, to test it properly
I have a number of suspicions that betta testing will be launched not earlier than October, but will end under the new year. Although you can add that "this is not accurate"
I don't know, whether did they give any clarification on when is the exact date for launching the beta testing and why they are talking a lot of time for releasing the beta testing?