WTo be frank, it'll be available when it's finished. The 3.0 nightly builds are still a little rough around the edges currently. Then it'll land in the beta channel which could take some time too. I'd say at least a couple months before a version is in the release/stable channel.
I have registered with a form, but I haven't received a key. The form was sent 3 times. So sad ((
But I need a key license to maintain usage time and I don't have ones to update channel to nightly/betaDo note that not all applications are accepted. And you don't need to register for the beta to do beta testing, anyone can by setting the update channel to beta or nightly.