Sailfish OS 1.1.0.39 alpha 4 for Nexus 5 (hammerhead) was released in December 18th 2014 :
https://wiki.merproject.org/wiki/Ada...for_hammerhead
http://forum.xda-developers.com/goog...alpha-t2841266

Known issues :
- OTA Updates do not work;
- the camera does not work;
- Android app support is not available.

Changelog:
* 2014-11-27 MultirROM users: if your primary ROM is Lollipop based, just install any SailfishOS version accompanied with CM11 .zip, and you'll have best of both worlds working! Thanks to @julle131 for finding this!
* Alpha4 - 18 December :
- Jolla Store enabled (but do not add Jolla Account during start-up wizard, skip and then add later, due to a known issue);
- Sailfish OS Update 9;
- Magnetometer support;
- Improved BT HID support (US bt keyboard layout provided);
- Generic BT improvements;