Opera Next 15 is now available for download.
For those who haven't been following this thread, N15 is the first Opera build to drop the Presto Engine and embrace Chromium/Blink instead (you can tell just by the installer size, which has almost doubled due to Chrome's bloat). As such, it is lacking a LOT of features (from what I hear through the grapevine, the Opera Skins are about to follow the dinosaurs, the European lion and the mammoths into the land of extinction) and should not be used as an everyday browser.
Oh, and in case you haven't heard of it either, Opera has decided to splice the Mail functionality away from the main source code. Opera Mail is now a completely standalone application (yes, it's now going into Thunderbird/Outlook territory).