We released a demo beginning of June, which got some nice feedback in the Oculus Forums and many other places:

https://developer.oculusvr.com/forums/viewtopic.php?f=42&t=2630

Some nice guy even made a little video about it:

If you want to get the demo too, just download it via torrent here: http://sebastiantobler.com/blackisland_alphademo.torrent

If you read this after GDC, please be aware that this is not the current demo.