If you join the mailing list [1], there'll be an announcement when it's ready, which hopefully won't be before long. Other perks include free stickers too :D [2].

[1] Send a blank email to wireguard-join at lists dot zx2c4 dot com.

[2] https://lists.zx2c4.com/pipermail/wireguard/2017-May/001338....