I'll be very interested in the release date for F&D beta. That will give a good indication for the release of the full blown version.
GenCon 2014, this August. It's when the other Beta books were released, and it's a great way to generate sales at one of, if not the biggest gaming-related convention of the year. We'll probably see the notification around June or July, which was when notification of the AoR Beta was published.
As to when folks not at GenCon actually get their copies... that's another matter. A lot of folks were upset that they didn't get their ordered copies of the AoR Beta until the end of September.