A final build of 1.3 was tagged with an accompanying changelog and announcement post. I found it weird that it had no more ceremony, nor any prior submission on hn, and as it had been announced through the kubernetes-announce mailing list for 17 hours, I figured its existence would be interesting to the community, so I submitted it in good faith.
In any case, kudos to everybody working on it and congratulations on the release, whether it's this week or the next.
[0]: https://groups.google.com/forum/#!topic/kubernetes-announce/...