We just waited until all the leaks have told the whole story already, makes for much cheaper marketing…
Anyway the Nexus 5 is available now: https://play.google.com/store/devices/details?id=nexus_5_black_16gb
Summary of Android 4.4: http://googleblog.blogspot.com/2013/10/android-for-all-and-new-nexus-5.html
(more details to follow in the coming days/weeks )