It's still visible in both the timeline and the revision history of a post.
The revision history can be reached by clicking the 'edited' link underneath the post:
If the post isn't edited yet, there's no such link, and you have to construct it yourself:
https://[SITE URL]/posts/[POST ID]/revisions. Example: https://stackoverflow.com/posts/549/revisions. (By the way, that's not caused by the new post notice rollout; it has been that way for as long as I can remember.)
The timeline link was hidden on purpose but it's now readily visible:
It will lead you to a URL like this one: https://stackoverflow.com/posts/549/timeline
Sometimes you need to scroll through a lot of daily vote summaries, but you'll find an entry like this: