We have published a Release Candidate of openHAB 2.0.0 on Bintray and via APT repo.
Please help testing it - if you come across critical or blocking issues with it, please report them asap.
The focus should be on the core runtime/distro - it is clear that different add-ons have different levels of quality and some are still buggy and under heavy development; I plan to do 2.0.x patches regularly, which will automatically become available to the 2.0.0 distro. Likewise, new bindings (that are still in the review queue and not yet merged), will be added regularly and become available to all users.
UPDATE: What I had forgot to mention: Major work is being put into the documentation, but as this is a huge topic, we require your help! If everybody from the experienced openHAB users could pick one of these open documentation issues,, we could be sure to have decent documentation ready for the launch of openHAB 2! So please help us as good as you can.